摘要
2002年全年选择黄河三角洲地区种植的4个紫花苜蓿品种,研究了3茬刈割前后对生长发育动态和产量变化情况.结果表明,随着刈割茬次的增加,第2茬分枝数比第1茬明显增多,第1、2茬分枝数变化呈二次函数曲线,以第2茬最明显,分枝数在刈割后第18～22 d期间达到最高峰,之后开始减少.4个品种以第1茬刈割后日生长量最高, 以后逐茬下降,但苜蓿9651316和中苜1号第2茬刈割后日生长量有增长趋势.苜蓿SD003株高在第2茬略有增长, 其余3个品种逐茬降低.每平方米干质量也是随着茬数增加而降低.结合每茬生长发育动态和干质量情况,对第2 茬产量低的品种如96S016和中苜1号等品种,第2茬的收割日期可适当提前5-10 d.苜蓿SD003可适当延长第1茬收获时间.
Effects of different stubbles cradled on dynamic growth and yield in four alfalfa varieties were investigated in the area of Yellow River Delta during 2002. The results showed that the stubble s branch quantities with the cradling increased were more than the first stubble s, especially more increased after the second stubble. The branch quantities of four alfalf varieties cradled got to the peak at the 18th to 22nd days and then decreased . The highest daily growth appeared after the first stubble and decr...
出处
《华南农业大学学报》
CAS
CSCD
北大核心
2004年第S2期21-23,共3页
Journal of South China Agricultural University
基金
山东省农业良种产业化牧草项目(2002-3004)
