摘要
本研究以植物措施为主，工程措施为辅，对花岗岩红壤侵蚀区进行改良，在不同的地形区域种植山地绿肥、薪炭林、牧草和果树．５年的试验结果表明，这一措施有效地改变区域的植被状况，大大改善环境和土壤理化性状，提高土地生产力，是花岗岩红壤区改良的有效途径．１９９１年试验区内植被覆盖率提高到８５％，生物量达２６～３２ｔ／ｈｍ２·ａ，年减少水土流失量４３９４．２ｔ／ｋｍ２，夏季地表温度平均降低４．５℃，林中空气湿度相对提高．净直接经济效益９９５元／ｈｍ２，改土增肥效益达１１５６元／ｈｍ２，具有显著的社会经济效益．
The plant measurement among the improving measurements of the granite red soileroded region is dorminant, engineering measurement is supplementary. Green manure, fuelwood, herbage and fruit tree were phanted in different type of land according to its site condition. The five-year experiment shows that this measure ment not only improved efficiently theplant regime, but also improved the physical and chemical property of environment and soil, aswell as land productivety. In 1991, the mean coverage of vegetation in the experimental regionreached to 85%. Its biomass amounted to 26-32 t/hm2. a. The ammount of son loss every yearreduced by 4394. 2 t/km2. The soil mean temperature decreased by 4. 5℃ in summer. The airhumidity in the forest rose relatively. The direct economic effect reached to 995 Y /hm'. The effect of soil improvement was 1156 /hm2. This measurement brought great social benefit and economic benefit.
出处
《江西水利科技》
1996年第4期243-247,共5页
Jiangxi Hydraulic Science & Technology
关键词
花岗岩
红壤
侵蚀区
改良途径
Granite
Red soil
Eroded region
Improving approaches
