达乌里胡枝子生产性能

Lespedeza davurica Productivity

达乌里胡枝子播种当年单株地上生物量和草群产量均较低，生长2、3年单株生物量及草群产量较高；一个生育周期内，产量基本随生育期进程而增加，结实期干草产量是分枝期的4．6倍。达乌里胡枝子在结实期叶、果有脱落现象，故结实期产量低于或接近开花期；产量年度变化规律为，播种当年产量低，以后逐年增加，但受气候特别是降雨的影响较大，降雨量少，产量相对较低；达乌里胡枝子具有较好的再生性，宜晚刈割利用（7月13日），留茬高度为5cm。

The above-ground biomass of plant and population yield of second or third year of Lespedeza davurica are higher than the first seeded year; In a reproductive cycle, yield is increasing with the reproductive period, the dry yield of fruit stage is 4.6 times than branch stage. There are leaves and fruit shedding phenomenon during fruit stage, so the yield of fruit stage is lower or near flower stage; The annual variability of yield of the first year is the lowest, and then begins to increase, however, the chiasmic will affect the yield, especially rainfall, the lower rainfall the lower yield; L. davurica has good reproducibility, which is suit to mow later （13 July）, suitable mowing height is 5 cm.