Effect of integrated nutrient management on yield and nutrient uptake of rice (Oryza sativa) -wheat (Triticum aestivum) cropping system in lowlands of eastern Uttar Pradesh

Singh, G.; Singh, O.P.; Singh, R.G.; Mehta, R.K.; Kumar, V.; Singh, R.P.

Indian Journal of Agronomy 51(2): 85-88

2006


ISSN/ISBN: 0537-197X
Accession: 012781692

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Abstract
The effects of organic and inorganic fertilizers on the performance of rice (cv. Mahsuri)-wheat (cv. HUW 234) were studied in Bahraich, Uttar Pradesh, India, during 1999-2002. The treatments were: without NPK (T1); 100% recommended NPK rates or RR (T2); 25% N through farmyard manure (FYM) + 75% RR through inorganic fertilizers or IF (T3); 50% N through FYM + 50% RR through IF (T4); 75% N through FYM + 25% RR through IF (T5); 25% N through pressmud + 75% RR through IF (T6); 50% N through pressmud + 50% RR through IF (T7); 75% N through pressmud + 25% RR through IF (T8); 25% N through rice straw + 75% RR through IF (T9); 50% N through rice straw + 50% RR through IF (T10); 75% n through rice straw + 25% RR through IF (T11); 100% RR through IF + 25 kg zinc sulfate/ha (T12); and farmers' practice (40% N + 30 kg P2O5/ha + 2 t FYM/ha). Both crops were supplied with 120 kg N, 60 kg P2O5 and 50 kg K2O/ha. All treatments enhanced the growth and yield parameters, but the highest values were obtained with IF + pressmud. T6, T2, T3 and T7 gave the highest rice grain and straw yields, whereas T6 and T3 registered the highest wheat grain and straw yields. T6 also resulted in the highest rice-equivalent yield, total nutrient (N, P and K) uptake by rice and wheat, and cost benefit ratio. T3-T11 improved the soil organic C content and available P, but reduced the soil K content, bulk density, pH and electrical conductivity.