安徽省颖上县小张庄种植业子系统生态功能分析

Ecological Function Analysis for Planting Subsystem in Xiaozhangzhuang Village of Yingshang County, Anhui Province.

小张庄村位于淮北平原南部,常年平均气温15.1℃,光合作用时间221天,降水量905mm,但降水分配不均,加上地势低平,常有旱涝灾害发生。全村有耕地约324ha,以砂姜黑土为主,土壤基本性状良好,但生产力水平不高。为了从根本上改变农业低产面貌,

Through an ecological function analysis for the planting subsystem in Xiaozhangzhuang village of Yingshang county, it is considered that because of the continued improvement of farmland environment and readjustment of planting structures, the combination of communities, environment and technological regulation in the subsystem is rationalized. The analyses are made from three aspects: level and efficieney of energy input, cyoling of mineral nutrients and reproducing efficieney of investment funds. The photo-utilization ratio of dominant crops has reached or suppassed that in the middle reaches of the Changjiang River. The system has a strong self-sustainability to field nutrient balances. The soil N and P are surplus, but K is a little deficit. The reproducing efficieney of investment funds is significantly promoted when it reaches to a definite level.