中天山阴坡清除灌木的研究

本文研究了乌鲁木齐南山种羊场春秋放牧场灌木砍伐后,建立半人工草地的效果。灌木被砍伐后,消弱了灌木对下层草本植物的遮阴和竞争作用,改善了牧草营养条件,促进天然牧草迅速生长,增加了革本植物的盖度,提高了牧草质量,增加了草场牧草的数量,扩大了草场的可利用面积。通过10年在春秋季节内放牧利用,经目视观察和测定,没有发现地面有冲刷、水土流失和破坏生态环境的现象。灌木砍伐后次生灌木生长很慢,砍伐一次可利用多年,经济效果较好。我们认为这种改良措施是成功的。

A Study on Shrubbery Control on the Shade Slope of Mid-Tianshan Mountains

The result of establishing a semi-artificial grassland after shrubs were clear cutting is researched in this paper. The trial site was located on the spring-autumn grazings of Regbe Valley at the northeast of Nanshan Stud-Ram Farm in Urumqi. As result of cutting brushes, the shade and competition were crippled off the shrubs for the lower herb layers, thus the nutritive conditions of the herbage were improved, Which resulted in rapid growth of herbage, increase of the plant coverage, rise of the herb quality and quantity, and expanding of the available area of the grazing pasture. After 10 years' grazing practice on the pasture, there are no phenomina of washed ground, soil erosion and destroyed biological environment by visual observation and detection. After the original bushes were clear-up, the secondary shrubs grow very slowly. The pasture can be used for many years within one clear-up. It has possitive economic effect and, by our opinion, might be a kind of means to successfully improve pastures.