鄂西山地农林复合优化模式及效益评估

Benefit Evaluation of the Agroforestry Optimization Patterns in Western Hubei Mountainous Area

摘要:

摘要：为减少坡耕地水土流失现状，提高种植经济收入，在秭归县九畹溪镇实施5种农林复合种植优化模式。以农作物作为对照，对这5种模式生长情况进行调查，同时对经济效益和生态效益进行评估。结果表明：①主要树种成活率在90%以上，保存率在85%以上，保存面积达100%；②从经济效益上来看，农林复合种植模式总收入远高于单纯农作物种植模式，进入盛产期后以核桃＋茶叶埂模式收入最高，未进入盛产期时以香椿-药材+茶叶埂模式收入最高；③从生态效益来看，项目的实施每年平均可减少土壤流失532.61 t，年均径流量减少15 998.40 m3，全氮、全磷、有效钾年均流失量分别减少12.89，12.58，2.05 t。

Abstract:

Abstracts:The five kinds of agroforestry patterns were implemented at Jiuwanxi Township in Zigui County for reducing soil and water loss in slope farmland and increasing planting economic incomes. The economic benefits and ecological benefits of the five kinds of pattern were evaluated. The results showed that ①The main tree species survival rate was above 90% and the preserving rate was over 85% and the preserving area was up to 100%. ②Revenue of agroforestry patterns was far higher than the patterns of planting only crops on the economic point of view; The pattern of Carya cathayensis+tea top bunds when entering the period and Toona sinensis medicine+tea was the highest earning patterns when not entering the period. ③From the point of ecological benefits, the implementation of the project can reduce 532.6 tons of soil erosion and 15 998.40 m3 of runoff annually, and 12.89, 12.58, and 2.05 tons were reduced annually for total nitrogen, total phosphorus and effective potassium respectively.