Response of Integrated Nutrient Management on Crop Productivity and Soil Fertility under Rice–Wheat Cropping System in Chhattisgarh Plain Agro-Climatic Zone
A. K. Shrivastava
College of Agriculture, Waraseoni (Balaghat), Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur, Madhya Pradesh, India.
R. K. Thakur *
College of Agriculture, Waraseoni (Balaghat), Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur, Madhya Pradesh, India.
N. K. Bisen
College of Agriculture, Waraseoni (Balaghat), Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur, Madhya Pradesh, India.
S. K. Rai
College of Agriculture, Waraseoni (Balaghat), Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur, Madhya Pradesh, India.
S. Sarvade
College of Agriculture, Waraseoni (Balaghat), Jawaharlal Nehru Krishi Vishwa Vidyalaya, Jabalpur, Madhya Pradesh, India.
*Author to whom correspondence should be addressed.
Abstract
The study was conducted during 2016-2019 at farmer’s field under the Farmer FIRST Project (FFP), JNKVV-College of Agriculture, Balaghat, Madhya Pradesh, to assess the impact of integrated nutrient management on crop productivity, soil nutrient balance, and the economics of the rice-wheat cropping systems. Application of 75% NPK + 2.5 t vermicompost/ha + biofertilizers (BGA & PSB) produced significantly higher grain yields of rice and wheat (4495 kg/ha and 3455 kg/ha, respectively) over the farmer practice (3855 kg/ha and 2655 kg/ha, respectively). Maximum nutrient uptake (N, P, and K) by rice and wheat crops was recorded in the treatment receiving 75% NPK + 5 t/ha vermicompost + biofertilizers. The conjunctive use of inorganic fertilizers along with organic manure and biofertilizers gave the highest availability of soil N, P, K and Zn at the post-harvest of the wheat crop as compared to other treatment combinations. Further, results showed that the highest cost of cultivation (₹ 72400/ha) and net returns (₹ 84380/ha) were obtained in 75% NPK + 2.5 t/ha vermicompost + biofertilizer treatments. The benefit-cost ratio computed for the rice-wheat cropping system suggested that a higher B:C ratio is associated with higher production and better quality of the produce.
Keywords: FFP, INM, nutrient availability, production efficiency, net return, vertisol