机械覆膜穴播啤麦密度试验研究

机械覆膜穴播啤麦在宁夏淡灰钙土地区条件研究，其最适播种量99～159kg/hm2。合理群体结构：基本带225万～300万／hm2，最高总茎数1200万～1350万/hm2，分蘖成穗率达50％以上，收获穗750万/hm2以上，每穗粒数20拉左右，千粒重40g，增产4．9％～8．9％，增加效益525．60～974．40元／hm2。

Study on the Qensity of Brewing Barley in Bunch Planting and Plastic Sheet-Covered Cultivationby Machine

Brewing barley in buneh Planting and Plastic Sheet-Covered Cultivntion by machine Were Stuided inthe ochric serozem of Ningxia The optimal Seed guantity Should be 99. 0 ~ 159. 0kg/hm2. The Proper populationstrnetnre stould be as folloes: the basic seedlings 225 ~ 300 million./hm2; the peak totl amonnl of stetns 120. 0 -135.0 millions/hm2; the perxenagt of earbearing tiller at least 50%; the amount of harvesting ears over 75. 0millions/hm2; the Seeds Per ear 20; and the thousand-grain Weight 40g. The Per unit yield and the edonomicresulfs as compsred With control Were respetiuely increased by 4. 9 % ~ 8. 9 % and 525. 6~ 974. 4yuan/hm2.