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"Penelitian dilakukan untuk mengetahui adanya pengaruh variasi bentuk sumber nitrogen serta pemberian strain Nostoc GIA13a terhadap pertumbuhan vegetatif tanaman bayam. Proses penanaman tanaman bayam dilakukan selama 24 hari menggunakan sistem hidroponik Nutrient Film Technique NFT yang telah dimodifikasi. Perlakuan yang diberikan, yaitu medium Hoagland dengan sumber nitrogen nitrat yang ditambah strain Nostoc GIA13a P1, sumber nitrogen nitrat P2, sumber nitrogen amonium dan nitrat P3, sumber nitrogen amonium P4 dan sumber nitrogen amonium yang diberikan strain Nostoc GIA13a P5. Pemberian strain Nostoc GIA13a dilakukan pada 0 Hari Setelah Tanam HST dan 14 HST masing-masing sebanyak 2 g. Hasil uji ANOVA ? = 0,05 menunjukkan bahwa perlakuan yang diberikan memengaruhi tinggi tanaman, panjang akar, kadar klorofil total, berat basah dan berat kering tanaman bayam pada 24 HST. Perlakuan P2 menghasilkan tinggi tanaman, panjang akar, berat basah dan berat kering yang tertinggi dibandingkan dengan semua perlakuan dan didukung dengan hasil uji LSD ? = 0,01. Sementara itu, berdasarkan parameter tinggi tanaman, panjang akar, berat basah dan berat kering menunjukkan bahwa penambahan strain Nostoc GIA13a pada P1 dan P5 menunjukkan adanya kompetisi penyerapan nutrien antara tanaman bayam dan Nostoc GIA13a. Hasil pengukuran kadar klorofil menunjukkan bahwa penambahan strain Nostoc GIA13a pada perlakuan P1 dapat meningkatkan kadar klorofil tanaman bayam didukung dengan uji LSD ? = 0,01.

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The aim of the experiment was to determine the effect of nitrogen form variation and inoculation of Nostoc strain GIA13a on vegetative growth of spinach. The plants were grown in Nutrient Film Technique NFT hydroponic system for 24 days. The treatment which was given is the Hoagland nutrient solution with nitrogen source form sole nitrate with addition of Nostoc strain GIA13a P1, sole nitrate P2 , with both of nitrogen form ammonium and nitrate P3 , sole ammonium P4 and ammonium with the addition of Nostoc strain GIA13a P5 . Nostoc strain GIA13a was applicated as much as 2 g on the first day of cultivation in the hydroponic system and at 14 days after planting. The result of ANOVA test 0,05 showed that there was statistically difference between treatments on plant height, root length, chlorophyll content, wet weight and dry weight. Based on LSD test 0,01, P2 treatment showed the highest result in the following parameters, i.e. plant height, root length, wet weight and dry weight. The result from the application of Nostoc strain GIA13a to nutrient solution on P1 and P5 treatment showed that there was a competition for nutrient absorption between spinach and Nostoc strain GIA13a itself. Meanwhile, the result of chlorophyll content measurements showed that the inoculation of Nostoc strain GIA13a on P1 could increase chlorophyll content on spinach leaf, supported by LSD test 0,01."

"Penelitian yang telah dilakukan bertujuan untuk menganalisis pengaruh nitrat dan amonium serta pemberian strain Nostoc GIA13a terhadap pertumbuhan vegetatif tanaman kangkung Ipomoea aquatica Forsk. pada sistem hidroponik menggunakan larutan Hoagland. Penelitian menggunakan Rancangan Acak Lengkap RAL yang terdiri dari 5 perlakuan dengan 8 ulangan. Kelima perlakuan tersebut ialah Hoagland dengan nitrat ditambah Nostoc P1, Hoagland dengan nitrat tanpa Nostoc P2, Hoagland dengan nitrat dan amonium tanpa Nostoc P3, Hoagland dengan amonium tanpa Nostoc P4, dan Hoagland dengan amonium ditambah Nostoc P5. Pemberian Nostoc sebanyak 2 g ke dalam larutan hara dilakukan pada 0 hst dan 14 hst. Hasil Uji LSD.

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This research aims to analyze the effect of nitrate and ammonium as well as Nostoc sp. GIA13a on vegetative growth of water spinach plants Ipomoea aquatica Forsk. was carried out using a hydroponic system. Randomized Complete Design consisting of 5 treatments with eight replications was used in the study. The five treatments were Hoagland with nitrate plus Nostoc P1, Hoagland with nitrate minus Nostoc P2, Hoagland with nitrate and ammonium minus Nostoc P3, Hoagland with ammonium minus Nostoc P4, and Hoagland with ammonium plus Nostoc P5. Inoculation of 2 g of Nostoc sp. GIA13a in nutrient solution was performed at 0 hst and 14 hst. Furthermore, the LSD test results."

"Penelitian dilakukan untuk mengetahui pengaruh pemberian strain Nostoc terhadap pertumbuhan vegetatif dan generatif tanaman padi (Oryza sativa L.) varietas Ciherang. Penelitian menggunakan Rancangan Acak Lengkap dengan enam ulangan dan empat perlakuan. Perlakuan terdiri atas pemberian strain Nostoc BAD5, GIA13a, TAB7d, dan kontrol. Pemberian strain Nostoc dilakukan ketika padi berumur 15, 30, 45, dan 60 hari setelah tanam (hst). Biomassa berat basah strain Nostoc yang diberikan pada 15 dan 30 hst masing-masing sebesar 0,4 g dan biomassa berat basah strain Nostoc yang diberikan pada 45 dan 60 hst masingmasing sebesar 0,6 g. Hasil uji ANOVA (!= 0,05) menunjukkan bahwa pemberian strain Nostoc dapat menurunkan jumlah buah kosong. Hasil penelitian juga menunjukkan bahwa pemberian strain Nostoc dapat meningkatkan panjang akar dan jumlah buah isi (bernas), dengan uji Kruskal-Wallis (!= 0,05). Perlakuan GIA13a terbukti paling baik dalam menurunkan jumlah buah kosong, meningkatkan panjang akar dan jumlah buah isi, dengan uji LSD (!= 0,05).

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The experiment aim was to investigate the effect of Nostoc strains to vegetative and generative growth of Ciherang varieties of rice (Oryza sativa L.). The experiment used Randomized Completely Design with six replications dan four treatments. The treatments were applied by giving Nostoc strains BAD5, GIA13a, TAB7d, and control. Nostoc strains were inoculated at 15, 30, 45, 60 days after plantation (hst). Total of 0,4 g Nostoc biomass was inoculated at 15 and 30 hst, while 0,6 g Nostoc biomass was inoculated at 45 and 60 hst. The results of ANOVA test (!= 0,05) showed that inoculated of Nostoc strains had effect to decrease the number of filledout grains. The result of this experiment also had effect to increase the root length and number of filled grains, by Kruskal-Wallis test (!= 0,05). Strain of GIA13a proven the best treatment to decrease number of filled-out grains, increase root length and number of filled grains, by LSD test (!= 0,05)."

"Penelitian ini bertujuan untuk mengetahui pengaruh inokulasi kombinasi dua strain Nostoc terhadap pertumbuhan vegetatif dan generatif tanaman padi varietas Ciherang. Strain Nostoc yang digunakan yaitu CPG24 dan GIA13a yang dibuat dengan perbandingan 1:1; 1:2; dan 2;1. Pemeliharaan padi dilakukan dengan sistem SRI modifikasi sampai 112 hari setelah tanam. Parameter pertumbuhan dan perkembangan tanaman yang diukur mencakup fase vegetatif dan generatif tanaman padi. Dilakukan juga pengukuran kandungan unsur hara tanah dan parameter lingkungan.Hasil dari penelitian menunjukkan bahwa perlakuan pemupukan kombinasi Nostoc, secara umum memberi pengaruh yang bervariasi terhadap parameter vegetatif dan generatif tanaman padi varietas Ciherang. Pemupukan strain Nostoc tunggal CPG24 berpengaruh cukup signifikan dalam meningkatkan berat kering tanaman padi sampai 138%. Pemupukan strain Nostoc tunggal GIA13a berpengaruh cukup signifikan dalam meningkatkan pertumbuhan akar 147%, berat kering buah isi sampai 186%, dan rasio jumlah buah isi terhadap total jumlah buah sebesar 69,40%.

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The purpose of this experiment is to study the combination effect of inoculation of two Nostoc strains to the vegetative and generative growth of Ciherang paddy. Two Nostoc strains, CPG24 and GIA13a were used. Fertilizing treatments were designed with comparison 1:1, 1:2, and 2:1. Paddy plant were prepared using SRI modification method until 112 days old after planted. Biological parameters are including vegetative and generative growth of paddy. Also soil nutrients content and environment parameter have been analized.

The results show that combination fertilizing of two Nostoc strain CPG24 and GIA13a give variative effect to vegetative and generative growth parameter of Ciherang paddy. Single Nostoc CPG24 fertilizing give significat effect to increase dry weight of Ciherang paddy until 183%. Single Nostoc GIA13a fertilizing give significant effect to increase root growth until 147%, dry weight of grain until 186%, and filled/total grain ratio until 69,40%."

"Penelitian dilakukan untuk mengetahui adanya interaksi strain Nostoc GIA13a dengan akar tanama padi (Oryza sativa L.) varietas Ciherang melalui sistem penanaman hidroponik. Tanaman padi varietas Ciherang (T14) diko-kultivasi selama 14 hari dalam medium kontrol negatif yang berisi medium BG11 N-free konsentrat 10x, kontrol positif berisi medium yang mengandung IAA 15ppm, perlakuan 1 berisi medium dan strain GIA13a sebanyak 0,4 g, dan perlakuan 2 berisi medium yang mengandung IAA 15 ppm dan strain GIA13a sebanyak 0,4 g.Hasil penelitian menunjukkan bahwa strain GIA13a mampu melakukan interaksi dengan akar padi berupa penempelan pada zona maturasi akar dan bukan pada zona meristematis akar. Pemberian auksin (IAA) sebesar 15 ppm pada medium mampu menginduksi pemanjangan akar lateral dan rambut akar tanaman padi.

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The aim of present study was to determine the interaction of Nostoc strain GIA13a with roots of rice (Oryza sativa L.) Ciherang varieties by hydroponic system. Cocultivation of paddy (D14) grown for 14 days in negative control containing BG11 Nfree concentrate medium, positive control containing BG11 N-free concentrate plus auxin (IAA) 15 ppm medium, treatment 1 containing BG11 N-free concentrate medium and strain GIA13a as 0,4 g, and treatment 2 containing BG11 N-free concentrate plus auxin (IAA) 15 ppm medium, and strain GIA13a as 0,4 g.

Results show that strain GIA13a able to interact with rice roots to form attachment at maturation zone and not on meristematic zone. Fifteen ppm of auxin (IAA) in medium induce elongation of lateral root and root hairs of rice plant."

"Penelitian yang telah dilakukan dari Maret –Mei 2015, bertujuan untuk mengetahui pengaruh media tanam serta menentukan inokulum optimum untuk pembibitan tanaman padi varietas Ciherang. Pembibitan padi dilakukan selama 14 hari di rumah kaca menggunakan 4 media tanam berbeda, yaitu tanah kebun steril dan non steril serta pupuk organik steril dan non steril. Strain Nostoc CPG24 dan GIA13a masing- masing sebanyak 0,2; 0,4; dan 0,6 g diinokulasikan pada keempat media tanam pada hari ke-1 pembibitan. Parameter yang diukur adalah tinggi, panjang akar, serta berat basah dan berat kering tanaman. Hasil uji statistik menunjukkan media tanam berpengaruh terhadap pembibitan padi varietas Ciherang. Pengaruh strain CPG4 dan GIA13a terhadap pembibitan hanya terdapat di media pupuk organik steril. Pemberian variasi inokulum (0,2; 0,4; dan 0,6 g) strain CPG24 dan GIA13a mampu meningkatkan tinggi dan panjang akar secara signifikan (P<0,05) dibandingkan kontrol pada media pupuk organik steril.

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The experiment that has been done from Maret– May 2015 was used to know the effect of media and determine optimum inoculum for Ciherang rice germination. The rice germination was done for 14 days in the green house used four different medias, they are sterilized and unsterilized garden soil and also sterilized and unsterilized organic soil. Strains CPG24 and GIA13a was inoculated into four different medias on first day of rice germination as much as 0,2; 0,4; and 0,6 gram fresh weight for each strain. The effect of Nostoc strain to rice germination was evaluated by using vegetative parameters, including plant height, root lenght, fresh and dry weight. The statistic result showed that media gave effect for rice germination. Application of three variations of inoculum from both strains only gave effect on sterilized organic soil. Variations of inoculum of CPG24 and GIA13a strains had significant effect (P<0,05) to increase plant height and root lenght of plants in sterilized organic soil."

"Amaranthus hybridus L. atau bayam selalu menduduki posisi utama dalam preferensi konsumsi sayuran masyarakat Indonesia. Namun demikian, terdapat dua kendala dalam budidaya tanaman bayam yaitu penggunaan pupuk anorganik dan permasalahan kekeringan. Kitosan, biopolimer hasil deasetilasi kitin, diduga berpotensi untuk mengatasi kedua permasalahan tersebut. Penelitian ini bertujuan mengetahui pengaruh dan konsentrasi optimal kitosan untuk meningkatkan pertumbuhan vegetatif dan menurunkan laju transpirasi tanaman bayam. Konsentrasi kitosan yang digunakan yaitu 5 ppm, 10 ppm, 15 ppm, dan 20 ppm. Terdapat dua kontrol yaitu kontrol NPK dan kontrol pupuk kandang sapi. Sementara itu, keempat perlakuan kitosan menggunakan media tanam berupa tanah dan pupuk kandang sapi 1:1. Hasil penelitian menunjukkan bahwa penggunaan pupuk kandang sapi ditambah kitosan 10 ppm mampu meningkatkan jumlah daun dan berat basah secara signifikan terhadap kontrol NPK. Berdasarkan data tersebut maka perlakuan kitosan 10 ppm sama baiknya dengan kontrol pupuk kandang sapi. Sementara itu, peningkatan konsentrasi kitosan menyebabkan penurunan laju transpirasi, namun pada konsentrasi yang terlalu tinggi kitosan dapat memberi efek negatif pada pertumbuhan tanaman. Oleh karena itu konsentrasi optimal kitosan untuk menurunkan laju transpirasi harus disesuaikan dengan parameter pertumbuhan yaitu 10 ppm.

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Amaranthus hybridus L. or spinach always occupies a prime position in the vegetable consumption preferences of Indonesia rsquo s society. However, the use of inorganic fertilizers and drought stress are two obstacles in the cultivation of spinach plants. Chitosan, a chitin deacetylation biopolymer, is thought to have the potential to overcome both problems. This study aims to determine the effect and the optimal concentration of chitosan to increase vegetative growth and reduce the transpiration rate of spinach plants. The concentrations of chitosan used were 5 ppm, 10 ppm, 15 ppm, and 20 ppm. There are two control groups the NPK control and the cow manure control. Meanwhile, the four chitosan treatment use soil with cow manure 1:1. The results showed that the use of cow manure with 10 ppm chitosan was able to increase the number of leaves and wet weight significantly to the control of NPK. Based on this data, the 10 ppm chitosan treatment proves to be just as good as the control of cow manure. Meanwhile, the increase in chitosan concentration causes a decrease in transpiration rate, but at very high concentrations chitosan can have a negative effect on plant growth. Therefore, the optimal concentration of chitosan to decrease the transpiration rate should be adjusted with the growth parameter, specifically 10 ppm."

"Penelitian dilakukan untuk mengetahui pengaruh pemberian strain Nostoc CPG8, CPG24, dan CIM7 terhadap pertumbuhan vegetatif dan generatif padi varietas Ciherang. Data dianalisis secara statistik dengan uji ANOVA dan LSD, kecuali data jumlah daun, dianalisis secara deskriptif. Hasil penelitian menunjukkan pemberian strain Nostoc CPG24 dan CIM7 berpengaruh nyata meningkatkan tinggi tanaman akhir (P < 0,05). Strain Nostoc CPG8 dan CPG24 berpengaruh nyata menurunkan jumlah buah kosong (P < 0,05). Pemberian ketiga strain Nostoc tidak berpengaruh nyata terhadap parameter vegetatif panjang akar dan parameter generatif jumlah bulir, jumlah buah berisi, berat basah dan berat kering tanaman tanpa buahbuahh total buah per rumpun, jumlah buah bernas per rumpun, jumlah buah kosong per rumpun, berat basah tanaman, dan berat basah, serta berat basah dan berat kering buah.

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This experiment was conducted to see the effect of Nostoc strains CPG8, CPG24, and CIM7 to vegetative and generative growth of Ciherang varieties of rice. Data was analyzed used statistics, with ANOVA and LSD, except for leaf total was used descriptive. The result showed that Nostoc strains of CPG24 and CIM7 increased plant height (P < 0,05). Nostoc strains of CPG8 and CPG24 decreased the number of filled out grains (P < 0,05). Those three Nostoc strains had not affect increase root length, the number of panicles, the number of filled grains, fresh and dry weight plants without grain, and fresh and dry weight grains."

"Penelitian pengaruh pemberian variasi strain Nostoc CPG24 dan GIA13a yang diinokulasikan pada hari ke-1 dan hari ke-10 terhadap pembibitan padi (Oryza sativa L.) varietas Ciherang pada beberapa media tanam telah dilakukan sejak bulan Maret sampai Mei 2015. Berat inokulum total yang diberikan sebesar 0,2g; 0,4g; dan 0,6g pada media tanah kebun steril (TKS), tanah kebun non steril (TKNS), pupuk organik steril (POS), dan pupuk organik non steril (PONS). Pengamatan dilakukan terhadap panjang akar, tinggi tanaman, berat basah, dan berat kering tanaman padi pada umur 14 hari. Data dianalisis menggunakan uji ANAVA, kecuali data berat basah dan berat kering. Berdasarkan uji ANAVA, strain CPG24 dan GIA13a tidak berpengaruh terhadap panjang akar tetapi berpengaruh terhadap tinggi tanaman padi (P<0,05). Variasi inokulum tidak berpengaruh terhadap panjang akar dan tinggi tanaman padi (P<0,05). Media tanam berpengaruh terhadap panjang akar dan tinggi tanaman padi (P<0,05).

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The effect of Inoculation of Nostoc Strains CPG24 and GIA13a at the 1st and 10th day on the Germination of Ciherang Rice (Oryza sativa L.) in several media had been examined from March to May 2015. The given total inoculum are 0,2g; 0,4g; and 0,6g to sterilized soil (TKS), nonsterilized soil (TKNS), sterilized organic soil (POS), and nonsterilized organic soil (PONS). Observation is focused to root length, height, fresh and dry weight of 14-day-old plant. Data was analyzed by using ANAVA, with the exception of fresh and dry weight. Based on the ANAVA, CPG24 and GIA13a strain has no effect on root length but has an effect on plant height (P<0,05). Inoculum variation has no effect on root length and height of rice plant (P<0,05). The Media affects the root length and height of rice plant (P<0,05)."

"Azolla sp. dikenal berperan sebagai pupuk hijau ramah lingkungan karena mengandung nitrogen. Kandungan nitrogen pada Azolla sp. berasal dari simbiosisnya dengan Anabaena azollae, cyanobacteria pengikat nitrogen. Saat ini belum banyak penelitian mengenai pengaruh pengaplikasian Azolla dalam bentuk segar ke tumbuhan yang ditanam di sistem hidroponik. Penelitian yang dilakukan bertujuan untuk menganalisis pengaruh penambahan Azolla sp. segar terhadap pertumbuhan vegetatif pakcoy pada sistem hidroponik sistem sumbu dan untuk menganalisis potensi Azolla sp. segar dalam mengurangi pemakaian pupuk AB Mix. Penelitian dilakukan menggunakan sistem hidroponik sumbu dan menggunakan rancangan acak berblok (RAB) yang terdiri dari 5 perlakuan dan 5 ulangan. Kelima perlakuan tersebut adalah full AB Mix (P1), pupuk half AB Mix (P2), pupuk half AB Mix + 20 g Azolla sp. (P3), pupuk half AB Mix + 40 g Azolla sp. (P4), dan 40 g Azolla sp. (P5). Berdasarkan hasil uji lanjut Dunn (P<0,05), tumbuhan pakcoy pada perlakuan P1 tidak berbeda nyata dengan perlakuan P4 pada parameter jumlah daun, lebar kanopi, berat basah, serta berat kering. Sementara itu, tumbuhan pakcoy pada perlakuan P1 berbeda nyata dengan perlakuan P4 dalam hal kandungan klorofil total. Kombinasi Azolla sp. segar 40 g dan AB Mix 50% pada volume larutan nutrisi 2,5 L dapat mendukung pertumbuhan vegetatif pakcoy dalam hal jumlah daun, lebar kanopi, berat basah, dan berat kering. Penggunaan Azolla sp. segar 40 g tanpa penambahan pupuk AB Mix pada volume larutan nutrisi 2,5 L dapat digunakan untuk mengurangi penggunaan pupuk kimia, namun tidak dapat berperan sebagai sumber nitrogen tunggal bagi tumbuhan.

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Azolla sp. is known as an environmentally friendly green manure because it contains nitrogen. Nitrogen content in Azolla sp. is derived from its symbiosis with Anabaena azollae, nitrogen-fixing cyanobacteria. There is not much research on applying Azolla in its fresh form to plants grown in hydroponic systems. The research aimed to analyse the effect of the addition of Azolla sp. fresh on the vegetative growth of Bok choy on the axis hydroponic system and to analyse the potential of Azolla sp. fresh in reducing the use of AB Mix fertilizer. The study was conducted using a hydroponic axis system and a randomized block design (RAB) consisting of 5 treatments and 5 replications. The five treatments were complete AB Mix (P1), half AB Mix (P2) fertilizer, half AB Mix fertilizer + 20 g of Azolla sp. (P3), half AB Mix fertilizer + 40 g of Azolla sp. (P4), and 40 g of Azolla sp. (P5). Based on Dunn's test results (P<0.05), Bok choy plants in treatment P1 were not significantly different from treatment P4 in the number of leaves, canopy width, fresh weight, and dry weight. Meanwhile, Bok choy plants in treatment P1 significantly differed from treatment P4 in total chlorophyll content. The combination of a 40 g fresh Azolla sp. and AB Mix 50% at a volume of 2.5 L nutrient solution can support the vegetative growth of Bok choy in the number of leaves, canopy width, fresh weight, and dry weight. A fresh 40 g Azolla sp. fertilizer without adding AB Mix fertilizer at a volume of 2.5 L of the nutrient solution can be used to reduce chemical fertilizers but cannot act as a sole nitrogen source for plants."