刈割次数和时间对红豆草产草量和越冬率的影响

EFFECTS OF CUTTING REGIMES ON DRY MATTER YIELD AND OVERWINTERING OF SANIFOIN

本文对红豆草在一年内的最佳刈割次数和刈割时间进行了探讨,试验结果表明,不同刈割次数和时间对红豆草当年的产草量、越冬率以及第二年生长发育和牧草产量都有显著的影响。在本地区,红豆草在整个生长季内,以刈割两次为宜,最佳刈割时期应是:第1次在6月中旬;第2次在9月上旬。最后1次刈割期不宜超过9月中旬,否则将会缩短红豆草在生长季内的再生时间,减少碳水化合物的贮藏量,降低越冬率,对第二年红豆草的生产率产生不良影响。但当红豆草地上部分完全干枯时(11月或12月份)进行刈割,则对其越冬率和来年第一茬产草量影响很小。

This paper dealts with the optimum cutting times and periods of sainfoin in a year. The results shows that the cutting tims and periods not only greatly effects the sainfoin producting and it's overwintering rate in the investigating year but also greatly effect the growing and the producting in the follouring year. In this area, the proper cutting is two times in a whole sainfoin growing season the optimun cutting periods should be mid—junle for the first cutting and before mid—september for the second respectively, and the second catting period should not be over mid—september; otherwise it will short sainfoin regrowing time and cut down the storing of carbohydrate, effect the overwintering rate and it's productivity in the following year. However, when the airparts has withered, such as November and december, Cutting sainfoin has not any influnces on it's overwintering rate and on the first cutting produting following year.