Soil organic matter and NPK status as influenced by integrated use of green manure, crop residues, cane trash and urea N in sugarcane-based crop sequences

doi:10.1016/0960-8524(95)00084-4

Bioresource Technology

Volume 54, Issue 2, 1995, Pages 93-98

https://doi.org/10.1016/0960-8524(95)00084-4 Get rights and content

Abstract

A field experiment was conducted at Lucknow (26·5°N, 80·5°E, 120 m above mean sea level), India, during 1992–1995 to compare biomass productivity and crop yields in Sesbania aculeata (as green manure)-sugarcane-ratoon and rice-sugarcane-ratoon rotations at 0, 150 and 300 kg ha⁻¹ N through urea to sugarcane, and 0, 75, 150 and 225 kg N ha⁻¹ applied to the subsequent ratoon crop with and without trash mulch. The Sesbania-sugarcane-ratoon rotation added 14·48 t ha⁻¹ biomass to the soil compared with 4·81 t ha⁻¹ by the rice-sugarcane-ratoon rotation because Sesbania yielded a significantly greater biomass (11·12 t ha⁻¹) than did the residual rootmass of rice (1·68 t ha⁻¹) and sugarcane (2·64-3·83 t ha⁻¹). Soil organic carbon, however, tended to decline after green manuring with Sesbania but gradually increased after incorporation of rice-root residues. Trash mulching of the ratoon crop upgraded the level of soil organic carbon and mineral-N status compared to no mulching. Sugarcane yields were significantly higher in the rice-sugarcane-ratoon rotation than in the Sesbania-sugarcane-ratoon rotation. A multiple linear regression model; Y = 8·075 + 0·675 (PN) − 22·45(OC) + 0·671(P); R² = 0·965, showed that cane yields (Y) were influenced significantly by N uptake (PN), soil organic carbon (OC) and available P (P) status.

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There are more references available in the full text version of this article.

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Soil organic matter and NPK status as influenced by integrated use of green manure, crop residues, cane trash and urea N in sugarcane-based crop sequences

Abstract

Biores. Technol.

C, N and S mineralization of crop residues as influenced by crop species and nutrient regime

Plant Soil

A Practical Manual for Soil Fertility