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以华北低丘山地退耕还林区的耕地、农田撂荒地、退耕10年刺槐林和退耕43年刺槐林为研究对象,采用土壤质量综合指数探讨退耕措施对土壤质量的影响.结果表明:随着退耕年限的增加,退耕刺槐人工林土壤养分的表层富集作用显著,且0~5 cm土层土壤改良效果增强;与耕地相比,退耕刺槐人工林的土壤物理性状得到改善,养分含量增加,土壤微生物生物量显著提高.不同土地利用类型的土壤质量综合指数为退耕43年刺槐林(0.542)>退耕10年刺槐林(0.536)>撂荒地(0.499)>耕地(0.498),说明退耕地人工造林改善了华北低丘山地退耕地区的土壤质量.
The objective of this study was to evaluate the effects of the conversion of farmland to soil quality on the basis of the farmland, abandoned farmland, abandoned locust 10 years of acacia plantation and the return of 43 years of acacia forest in the hilly and mountainous areas of North China. The results showed that with the Compared with the cultivated land, the physical properties of the returned artificial forest of Robinia pseudoacacia improved, the nutrient content increased, the soil nutrient content increased, Soil microbial biomass was significantly increased.The comprehensive index of soil quality for different types of land use were the conversion of 43 years of Robinia pseudoacacia forest (0.542)> 10 years of abandoned acacia forest (0.536)> fallow land (0.499)> cultivated land (0.498) Afforestation improved the soil quality in the area of returning farmland to hilly areas in North China.