安徽农业科学2012，Vol.40Issue(32)：15782-15783,15786,3.
黄土高原丘陵沟壑区不同退耕还林模式对土壤微生物的影响
Effects of Different Models Used in Conversion of Cropland to Forest on Soil Microorganism in A Gully-hilly Region of the Loess Plateau
摘要
Abstract
[ Objective ] To study effects of different afforestation models after 9 years on soil nutrients and microorganism in gully-hilly region of Loess Plateau. [ Method] The soil nutrient and soil microorganism were compared under 3 afforestation models used in the engineering of returning farmland to forest(grass) in Qinzhou District in Tianshui City of Gansu Province. [Result] The results showed that soil organic carbon, TN, TP, TK', AN, AP and AK increased with returning control to agricultural land. There were three principal microbes in the soil, bacteria being the most, followed by actinomycetes and fungi. The order of different components including bacteria and actinomycetes was: cropland control > economic forest > tree and grass types > tree types. In a contrary, fungi showed that tree and grass types > tree types > economic forest > cropland control. The soil microorganism quantity decreased with the increase of soil depth. [Conclusion] After returning cropland to forest, soil fertility quality was significantly improved as compared to agricultural land, the activation of microorganism would be accelerated and the main microbial quantity would be increased too. Afforestation of ecological forest is an effective measure for increasing the quality of the soil, mingled forest of tree and grass would be the best example in gully-hilly region at Loess Plateau.关键词
退耕还林/土壤微生物/丘陵沟壑区/黄土高原Key words
Conversion of cropland to forestland/ Soil microorganism/ Gully-hilly region/ Loess Plateau分类
农业科技引用本文复制引用
张宏霞,沈育伊,郭永红..黄土高原丘陵沟壑区不同退耕还林模式对土壤微生物的影响[J].安徽农业科学,2012,40(32):15782-15783,15786,3.基金项目
巩固退耕还林成果后续产业发展林产品基地建设项目 （）
中央财政林业科技推广示范资金项目[2010(ZYTG)01号]. （ZYTG）
