青刈黑麦产草量与营养动态分析

青刈黑麦草在黄淮海地区具有广阔的发展前景。本文针对棉花冬闲田，对青刈黑麦在不同生育阶段的产草量、营养成分含量、刈害时间及刈害次数进行研究。结果表明，一次利用时，刈害时间不能超过抽穗后期。两次利用时，头茬刹害时间不能超过拔节期，二茬应在抽穗后期刈割。后者草的质量优于前者，但产草量较低，因此在实践中可根据需要决定刈割次数。

Study on the Dynamics of Dry Matter and Nutritions in Rye

Because rye in unoccupied cotton fields in winter was made good use, a fine look had been taken on. The hay production and nutrition of rye in different development stage, and the effect of harvest times and date on the hay yield and quality had been studied. The result that the date of one cutting must be earlier than later heading stage, and the first date of two cuttings cannot be later than jointing stage. The hay quality of two cuttings is better than that of one cutting, but the yield is low.