南方山区人工草地的复壮

REJUVENATION OF AN ARTIFICIAL PASTURE ESTABLISHED IN THE SOUTHERN REGION, CHINA

本文用正交试验方法,通过去杂、施肥、补播、禁牧综合措施对因杂草严重侵入而导致建植草种过早丧失生产性能的“黑麦草—白三叶”人工草地进行了复壮试验。结果表明,在当地条件下,去杂和施肥是两项最有效的复壮措施,短期内即可使牧草产量分别提高1.29倍和66.6%;第5个处理(即50%去杂,每公顷施用尿素75公斤、磷二铵120公斤,每公顷补播黑麦草种籽9公斤、白三叶草种籽1.875公斤,禁牧三个月)为最佳组合。在第一次刈割中,其产量提高3.12倍,黑麦草和白三叶草的盖度分别提高42%和30%,而杂草比例却下降55.1%。

Rejuvenation test of the artificial pasture(Lolium multiflorum & Trifolium repens) of the lostover-early productive performance for the intense invading of the rank weeds was conducted by the synthtic measure of weeding, fertilizing, resowing, confining and applying the orthogonal testing method. Result indicates that weeding and fertilizing together are the most effective measures among all of the treatments. It caused respectively the yield of mixed-herbages to be increased by 129% and 66.6% in the first harvest. The fifth treatment combination(weeding by 50%;urea,75kg/ha;ammonium phosphate, 120kg/ha;italian ryegrass and white clover,9 and 1.875kg/ha,respectively;and confined for three months) is the best one among them. The output of hay the vegetation density of grass and legume increased 3.12 times,and the coverage rates of them increased by 42% and 30%, individually. While the weight proportion of the weeds decreased by 55.1%.