Site specific nutrients management and conservation-tillage practices in maize-mustard relay cropping under rainfed conditions

摘要

In mono-crop area, maize-mustard relay cropping system is observed to play key role in improving grain productivity under rain fed conditions. An experiment was designed on relay cropping system of two crops (Maize and Mustard) with fertility levels compared with Site Specific Nutrients Management and conservation tillage practices was compared with conventional production system during both kharif 2012-2013 and rabi 2013-2014 at ZARS, Jawaharlal Nehru Krishi Vishwa Vidhyalaya, Chhindwara, Madhya Pradesh. In Site Specific Nutrients Management (SSNM), the three conservation management sowing practices viz., conventional, permanent plot and zero tillage with equal number of NPK treatments and 50% RDF (60:30:20 kg/ha), 100% RDF (120:60:40 kg/ha) and SSNM(140:34:71 kg/ha) were used. Results reveals that the grain yield of both the crops, maize and mustard found highest in site specific nutrient management (SSNM) than 50 % RDF and 100 % RDF. In addition, conventional method of sowing showed significantlyhigher grain yield, 4573 kg/ha of maize, whereas, mustard gave high grain yield, 1002 kg/ha under zero tillage practices. The status of NPK after harvest mustard increased significantly with successive increase in fertilizer level. Treatment with site specific nutrient management 140:34:71 N P K kg/ha exhibited highest NPK (192 N, 22.2 P, 307 K kg/ha) status that was significantly higher than 100 % RDF (135 N, 16.8 P, 281 K kg/ha) and 50 % RDF (126 N, 14.8 P, 256 K. kg/ha). The site specific nutrient management with conventional method of sowing exhibited to increase grain yield and its attributing characters in maize under maize-mustard relay cropping in rain fed conditions. Thus relay cropping system which is environmental friendly, socially acceptable and economically feasible offers an alternative production system over the conventional production system.