Balance sheet of nitrogen, phosphorus and potassium under different rice (Qryza: sativa) based cropping systems
DOI:
https://doi.org/10.59797/ija.v47i1.3108Keywords:
Rice based cropping . . systenls, NPK uptake Balance sheet, .Abstract
The field experiment conducted at the Indian Agricultural Research Institute, New Delhi, during the crop years 1995 96 and 1996 97 indicated that rice (Oryza sativa L.) berseem (Trifolium alexandinum L.) cropping system removed the rnaximum, quantity f NPK (1,140 kglha), followed b y rice potato (Solanum tuberosum L.) greengram (Phaseolus radiatus L.) (1,060 kglha) and riceIndian mustard [ rasiica juncea (L.) Czerng. osson] greengram (1,029 kglha) cropping syskm. Heavy depletion of NPK by rice berseem cropping system . resulted in nega ive ba ance of nitrogen (144 kglhaj, phosphorus (23 kglha) and potassium (41.6 kglha). Rice Indian mustard greengramcropping system alsa tesulted in negative balance of 131 kglha of N and 330 kglha of K. Nitrogen and phosphorus balance was found positive in rice wheat (Triticum aestivum L. emend. Fidri Paol.) greengram and rice potato greengram cropping systems,. whereaspotassium ba ance was negative in these cropping systems. These results, thus, show that potassium was found to be most removable nutrient by .the crops, which results in. mining of sqjl K and thus calls for adequate feytilization. . .References
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