不同刈割频度下二色胡枝子根系及地上生物量的研究

Cutting Frequency Effect on Root System and Aboverground Part Biomass of Lespedeze bicolor

研究了我国华北野生二色胡枝子Lespedeza bicolor 在不同刈割频度下的根系生长状况及最大地上生物量下的最佳刈割频度。结果表明,随着刈割频度的增大,根数、根质量、根瘤及可溶性糖等指标明显下降;1年之中刈割3次,每6周刈割1次,其地上生物量最大,由此证实适度的刈割频度有利于二色胡枝子的收获和生长。

The thesis researches that different cutting frequency of wild Lespedeze bicolor in North China Area has effect on different root system growth and root system soluble sugar. The results show that root weight, soluble root system weight and the number of root nodule decrease obviously as cutting frequency increasing. According to aboverground part biomass, a cutting interval of six weeks and three-time cutting can obtain maximum aboverground part biomass and maximum occurred over-compensatory growth in a year. The research proves that certain cutting frequency will benefit sprouting and growth of L.bicolor.