The Influence Of Four Treatment Measures On Larix Principis-Rupprechtii Litter Decomposition And The Soil Nutrient

This experiment selected Hebei forestfloor 22 years old Larix principis-rupprechtii stands as the research object,the nitrogen source through the litter,applying wood vinegar,thinning,mixed litter were 4 different measures to promote the role of research and analysis of different promotion measures under larch the litter decomposition rate changes and effects on soil nutrients.The results showed that:1)the decomposition rate of litter applied no significant changes of nitrogen source,nitrogen source and promote litter decomposition of soil total nitrogen accumulation effect,inhibit the accumulation of total phosphorus had no significant effect on total potassium,but effect of organic matter in the soil.When the amount of nitrogen was lOg N·m·-2·a-1 the litter decomposition of soil nutrients to promote the most significant effect;2)application of wood vinegar on Larix principis-rupprechtii litter fall The decomposition rate has accelerated,spraying wood vinegar residue rate of litter weight than that of blank control group were significantly decreased,when the wood vinegar diluted 400 times,the most significant litter promote nitrogen accumulation in soil,high dilution inhibited soil nitrogen accumulation,application of wood vinegar to potassium soil promote litter under the effect,cumulative total phosphorus,and organic matter accumulation are promoted,when wood vinegar diluted 400 times the best effect;3)the decomposition rate of thinning of Larix principis-rupprechtii litter increased after thinning,the litter weight of the residue rate is significantly reduced.Can promote litter in soil total nitrogen under the effect of cumulative total phosphorus,total potassium accumulation of no obvious effect,but can promote the accumulation of organic matter,the thinning intensity was 20%,the most significant effect in enhancing the performance;4)Larix principis-rupprechtii and Betula platyphylla mixed litter accelerate the decomposition rate of the mixed litter,after mixing the weight of the residue rate than pure Larch litter were reduced,mixed litter treatment can obviously promote the accumulation of soil nitrogen and total phosphorus elements,had no significant effect on soil total potassium accumulation of soil organic matter promoted and changed significantly.The larch birch litter and mixed ratio of 6:4 is the most significant effect;5)than the optimal comprehensive treatment of four kinds of treatment measures,the optimal treatment measures for wood vinegar diluted 400 times.