行距与播种量和施肥量对塔乌库姆冰草种子产量的影响

Effect of row space,sowing rate and fertilizingamount on seed yield of Agropyroncristatum cv.Tawukumu

摘要:

以塔乌库姆冰草为试验对象,采用三因子三水平正交试验,研究了行距,施肥量和播种量对其种子产量的影响。结果表明:对塔乌库姆冰草种子产量影响的主要因子是行距,其次是施肥量,播种量影响较小;当行距30 cm,施肥量225 kg/hm2,播种量15 kg/hm2 时,种子产量最高,达675.6 kg/hm2。对冰草种子产量贡献率进行大小排序为:小穗种子数>生殖枝数>小穗小花数>每生殖枝小穗数>千粒质量,通过优化栽培措施增加单位面积上生殖枝数、每生殖枝小穗数,可有效提高冰草种子产量。

Abstract:

In this study,Agropyron cristatum cv.Tawukumu was used as test material and a orthogonal designwas utilized with three factors(row space,sowing rate,fertilizing amount).The seed yield were determinedand analyzed.The results show that the row space was the main factor affecting the seed yield of A .cristatum ,the second factor was fertilizing amount,and the sowing rate only had less influence;There was highest seedyield of 710.43 kg/hm2 with the row space of 30 cm,sowing rate of 15 kg/hm2,and fertilizing amount of 225kg/hm2.The contribution rate of A .cristatum seed yield was ranked as follows: number of spikelets>numberof reproductive branches>spikelets>spikelets per reproductive branch>1 000-grain weight.The resultsshowed that the seed yield of A .cristatum could be effectively increased by optimizing cultivation measures toincrease the number of reproductive branches per unit area and spikelets per reproductive branch.