云南人工草地复壮技术研究

Studies on recovering techndogy of artifically sown grassland in Yunnan province

用正交试验方法 ,通过除杂、施肥、补播等措施 ,对因杂草侵入、缺水缺肥、利用过度而导致建植草种过早丧失生产性能的“多年生黑麦草———白三叶”人工草地进行复壮试验表明 :施肥是较有效的复壮措施 ,牧草产量至少可提高 6 5 4 % ;10 0 %除杂 ,每公顷施用尿素 150kg、普钙 10 5kg、硫酸钾 30kg ,松土撒播多年生黑麦草种子 13 5kg、白三叶草籽 4 5kg为最佳技术组合 ,两年平均其牧草产量比对照高 2 13倍 ,草层盖度提高 0 71倍 ,草层平均高度比对照高 31 2cm 。

In order to recover the deteriorated “Perennial ryegrass-white clover”grassland caused by weeds,fertilizer absence,water shortage and over-using,compound technology such as weeds killing,over seeding,fertilizing and so on were applied to resume its productive ability. Results indicated that fertilizing was the most effective method to recover its production force.Affter fertilizing,65.4 percent of its production were improved at least .And the best compound method was killing weeds completely,applying CO(NH 2) 2 150kg/hm 2,Ca(H 2PO 4) 2+CaSO 4 105kg/hm 2,K 2SO 4 30kg/hm 2,Overseeding perennial ryegrass 13 5kg/hm 2and white clover 4 5kg/hm 2.Affer sowing two years, average production was 2 13 times higher than that of the contrast.The coverage of grass was improved by 0.71times.Average height of grass layer was 31.2cm higher than that of contrast.The whole nutritional structure of the community was changed greatly.