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Effect of different sources of nitrogen on nitrogen absorption and transfer in Gilan local bean in organic agriculture
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Abstract: (2998 Views) |
In order to evaluate the effect of the plant growth promoting bacteria and mushroom compost residues on nitrogen absorption and its translocation in common bean an experiment was conducted as a completely randomized design with four replications in Rasht during the cropping year of 2014 -2015. The experimental treatments were control (with inoculation by bacteria and non-application of compost), Azospirillum bacteria, Azotobacter bacteria, mushroom compost (2 ton per hectare), mushroom compost + Azospirillum and mushroom compost + Azotobacter. The results of the experiment showed that with increasing plant growth, the nitrogen concentration of the plant increased till flowering stage, but this increase continued for nitrogen absorption till the seed filling stage. The experimental treatments increased acid and alkaline phosphatase enzyme activity by 31 to 67 and 42 to 75 percent, respectively, and the treatment of the application of bacteria + mushroom compost showed the highest enzymatic activity. Comparison of mean treatments indicated that Azotobacter + mushroom compost treatment showed the highest amount of chlorophyll a and total chlorophyll content (11.8 and 15.8 milligram per millimeter, respectively). The highest number of root nodes (81.4 node), biological yield (6032 kilogram per hectare) and protein yield (398 kilogram per hectare) were obtained from treatment of Azospirillum + mushroom compost. Also, the applied treatments increased grain yield by 11 to 49 percent compared to control treatment and Azospirillum + mushroom compost treatment with 2104 kilogram per hectare was significantly superior to other treatments. The results indicate that the inoculation of plants with Azospirillum and the application of mushroom compost, while increasing the grain yield, also increases the protein content of the grain. Therefore, in order to obtain maximum grain yield of beans, it is recommended to use mushroom compost under inoculum with Azospirillum in Rasht area. |
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| Keywords: Grain protein, Nitrogen absorption process, Biological yield, and Chlorophyll. |
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Full-Text [PDF 353 kb]
(3967 Downloads)
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Type of Study: Applicable |
Subject:
Crop Physiology
Received: 2017/11/9 | Accepted: 2017/11/9 | Published: 2017/11/9
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