Effects of organic residue cycling on soil nitrogen mineralization characteristics of rice cropping system in red soil region of China

Abstract

Abstract: The experiment of the effects of fertilization on productivity and soil environment was studied using leaching incubation at intervals. The soil Nmineralization parameter was obtained with the first order dynamic equation. The effects of long-term organic residue cycling on soil organic matter (SOM), active organic matter (AOM), readily oxidizable organic matter (ROM) and the relationships among N₀, SOM, AOM, ROMwere discussed. The results showed that N₀ increased significantly under organic residue cycling of rice cropping system in red soil area of China. Obviously seasonal change characteristics of N₀ could be observed. However, the parameter Kwas opposite to N₀. The more N₀ was, the smaller Kwas. Kvaried from 0.0233 to 0.0799 week^-1. It could increase the content of SOM, improve the quality of SOM, and enhance its activities after organic residue cycling in the rice cropping of red soil area of China. Significant correlations among N₀, and SOM, AOM, ROM was observed.

Key words: Chinese fir thinning wood, Compression, Physical-mechanical quality, Microstructure

CLC Number:

S153.6

ZHOU Weijun, WANG Kairong, LIU Xin . Effects of organic residue cycling on soil nitrogen mineralization characteristics of rice cropping system in red soil region of China[J]. cje, 2004, (1): 39-43.

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