YIELD, NUTRIENT CONTENT AND NUTRIENT UPTAKE OF RICE AS INFLUENCED BY RICE BASED CROPPING SYSTEM IN VARANASI OF EASTERN UTTAR PRADESH, INDIASantosh Kumar, J.S. Bohra, Kiran Rana, Gargi Goswami and P.K. Mishra
Continuous adoption of cereal-cereal cropping system has led to deterioration of soil quality resulting in a serious threat to its sustainability and food security in hot sub-humid region of eastern Varanasi, India. Therefore crop diversification with wider choice in the production of a variety of crops is being promoted meet the demand of balanced food for increasing population. Ten rice- based crop sequences were tested to found the influence of different crop sequences on yield, nutrient content and uptake of nutrient by rice. Rice in rice-wheat-sesbania crop sequence recorded highest number of effective tiller (414.6 m-2) than other crop sequences whereas, number of non effective tiller (m-2) of rice was found maximum (53.33 m-2) in ricewheat- green gram sequence followed by rice-wheat sequence (52.33 m-2). Grain filling % of rice was recorded maximum in sequence (58.9) but test weight (g) of rice was found maximum (28.17) in rice-mustard-green gram sequence. Grain and straw yield (q ha-1) of rice was reported highest in rice-wheat-sesbania and ricepotato green gram sequence respectively. However, highest harvest index (35.62) was reported in crop sequence. N, P, and K content of rice grain was found highest in rice-maize (green cob)+ veg. pea (1:2)-cow pea(f), rice-wheat+mustard (5:1)-black gram and rice-veg. pea-ladys finger sequence respectively. Ricewheat- sesbania crop sequence recorded highest N and P uptake (i.e. 89.1 and 20.07 kg ha-1, respectively) of rice among all the sequences.
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