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将小叶杨分别与其他11个树种枯落叶粉碎混合后进行室内分解培养,分析不同树种枯落叶混合分解对土壤性质的影响及其相互作用.结果表明:12个树种枯落叶单独混土分解均明显提高了土壤脲酶、脱氢酶、磷酸酶活性和有机质、碱解N含量,但对土壤速效P含量和土壤阳离子交换量(CEC)的影响差异较大,其中柠条和紫穗槐枯落叶改善土壤性质的效果明显.小叶杨分别与油松、侧柏、刺槐、白榆枯落叶混合分解,对土壤微生物数量的影响存在相互促进作用;小叶杨分别与侧柏、柠条枯落叶混合分解对土壤有机质、速效P、速效K含量和CEC的影响存在相互促进作用,但对土壤大部分酶活性的影响却存在相互抑制作用;小叶杨与落叶松枯落叶混合分解对土壤多数酶活性和养分含量的影响存在相互促进作用,而与樟子松枯落叶混合分解时则有抑制作用.总体上,小叶杨分别与白榆、油松、落叶松和刺槐枯落叶混合分解可促进土壤性质的改善,而与侧柏、柠条、樟子松、沙棘和紫穗槐枯落叶混合分解时则相互抑制.
The Populus simonii was comminuted with the litter of the other 11 tree species separately and then decomposed and cultivated indoors. The effects of mixed decoloring of different tree species on soil properties and their interactions were analyzed. The results showed that the decomposition of the litter and leaf of 12 species alone was obvious The activities of soil urease, dehydrogenase, phosphatase and organic matter and alkaline hydrolysis N were increased, but the available soil P and soil CEC greatly differed. Among them, the litter of Caragana korshinskii and Amorpha fruticosa were improved The effect of soil properties was obvious. Populus simonii and Pinus tabulaeformis, Platycladus orientalis, Robinia pseudoacacia and Ulmus pumila were mixed and decomposed respectively, which had the mutual promotion effect on the quantity of soil microorganism. Soil organic matter, available P, available K and CEC had the mutual promotion effect, but had a mutual inhibitory effect on most soil enzyme activities. Mixed decomposition of Populus simonii and Larix litter leaves had significant effect on soil enzyme activities and nutrient contents Of the role of mutual promotion, but with mixed decomposition of Pinus sylvestris litters when there is an inhibitory effect.Overall, Populus simonii and white elm Chinese pine, larch and locust leaf litter decomposition may facilitate improved mixing properties of soil, with the orientalis, Caragana, Pinus sylvestris, sea buckthorn leaf litter, and the amorphadiene when mixed with each other to suppress the decomposition.