Mixed litter decomposition of Larix principis-rupprechtii and Betula platyphylla
Research the mixed litter decomposition rate and nutrient dynamic change of Larix principis-rupprechtii and Betula platyphylla leaf litter with different mixing ratio (PB、PL、8L:2B、7L:3B、6L:4B、5L:5B). This reserch use the litter bag method. Important findings: (1) Different proportion of Larix principis-rupprechtii and Betula platyphylla mixed litter showed early decompose rapidly, slow decomposition characteristics late. (2) Decomposition rate of pure Betula platyphylla was higher than that of pure Larix principis-rupprechtii when separate decomposition, mixed treatment on litter decomposition have different degrees of promoting function, 6L:4B had the highest decomposition rate. (3) Mixed litter decomposition had significant effect on nutrient dynamic in the process of decomposition. It promoted the enrichment of Larix principis-rupprechtii litter of N element and P element, and N element and P element of the mixed litter enrichment raised with the increase of proportion of Betula platyphylla litter. The N element and P element content of mixed litter were higher than pure Larix principis-rupprechtii, and parts process (6L:4B、5L:5B) N element and P element content even more than pure Betula platyphylla in the late decomposition. It had no significant effect on the release of K. (4) Mixed litter decomposition reduced C/N and C/P of the larch litter.
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万方数据
