Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
8846346 | Acta Ecologica Sinica | 2017 | 5 Pages |
Abstract
The development of rural economy and ecological restoration were restricted with high temperature and drought in the dry-hot valley of Yuanmou country. The climate and human practice made a degrading ecosystem, and one marked question here was soil fertility degradation. Leguminous forage Stylosanthes guianensis were introduced for years in degraded mountainous dry-hot valley of Yuanmou. Aims to reveal devotions of planting and plowing S. guianensis to degraded mountainous soil fertility, three soil types and two treatments planting experiment were tested in the dry-hot valley of Yuanmou country. The results show that: 1. S. guianensis could adapt to degraded mountain soil. There was a large number of nodules and root in three soil types, number of root nodule was 174.048-650.667 grain/individual plant, root biomass was 214.667-1710.000Â kg/hm2. 2. With nitrogen fixation of root nodule, rot and decomposing of dry branches and fallen leaves, organic matter, total nitrogen, pH and germ of degrading soil tended to rising after S. guianensis planting and plowing. Increasing root biomass and rhizobium nodules had been repaired and improved microenvironment of soil, especially made an significant increase for germs, in 0-20Â cm soil from 0.020Â ÃÂ 105-1.54Â ÃÂ 105 to 1.880Â ÃÂ 105-70Â ÃÂ 105,and 20-40Â cm soil from 0.020Â ÃÂ 105-0.380Â ÃÂ 105 to 1.100Â ÃÂ 105-52.5Â ÃÂ 105. 3. S. guianensis, either planting or plowing into soil as green manure planting, could significantly (PÂ <Â 0.05) improve total nitrogen, organic matter, available phosphorus, available K of degraded soil in the fruit tree canopy drip line.
Keywords
Related Topics
Life Sciences
Agricultural and Biological Sciences
Ecology, Evolution, Behavior and Systematics
Authors
Huiying Long, De Zhang, Guangxiong He,