Vol. 10, Issue 7 (2021)

Author(s):
Nitesh Samadhiya, SP Singh, Girish Goyal, Murlidhar J Sadawarti, SK Sharma and LK Tripathi

Abstract:
A field experiment was conducted to evaluate the “Effect of organic and inorganic sources of nutrients on maize-potato cropping system” during 2019-20 at ICAR-CPRI-RS, Gwalior M.P. The experiment consisted of five treatments with four replications. The results revealed that application of 100% RDF NPK gave higher number of cobs (1.88/plant) at 60 DAS and (2.33/plant) at harvest. Application of 100% RDF NPK recorded higher cob length (22.13 cm). In contrast, application of decomposed crop residue @ 25 t/ha + biofertilizer (Azotobactor @ 1000 ml/ha + PSB @ 1000 ml/ha) recorded higher test weight (1000 – grain weight) (372.3 g) as compare to other treatments. Application of 100% RDF NPK recorded highest number of grains/cob (254.50) and maximum grain yield (6.88 t/ha) and stover yield (7.28 t/ha) compared to other treatments. Application of 100% RDF NPK also recorded the highest total tuber number (653541/ha) and tuber yield (30.05 t/ha) compared to other treatments. The maximum gross returns (₹ 121088/ha) and net return in maize (₹ 95577.3/ha) was recorded with 100% RDF NPK. Maximum gross return (₹300500/ha) and net return (₹ 221399.5) were recorded in potato with 100% RDF NPK. The highest equivalent yield (6.88 t/ha) of maize crop was recorded with 100% RDF NPK. There was minimum 18.16% reduction under maize equivalent yield of maize-potato cropping system over 100% RDF NPK. Maximum equivalent yield (17.073 t/ha) of potato and maize equivalent yield of system (23.953 t/ha) was recorded with 100% RDF NPK which was significantly higher over other treatments. Maximum gross return (₹ 421588/ha) and net return (₹ 316976.8) of system were recorded with 100% RDF NPK. Application of (100% RDF NPK) gave the highest (0.68%) OC, N content (212.36 kg/ha) and available K (409.46 kg /ha). Application of decomposed crop residue + bio fertilizers + FYM @ 7.5 t/ha recorded highest available P content in soil (20.77 kg/ha). Over all, application of 100% RDF NPK followed by decomposed crop residue @ 25 t/ha + biofertilizer (Azotobactor + PSB) + FYM@ 25 t/ha are better sources of nutrient application in maize-potato cropping system as compared to other treatments based on their economic viability.