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dong tu bo zhong
Author(s): 
Pages: 11-12
Year: Issue:  2
Journal: Farm Machinery

Keyword:  粮食损失雨期机械播种播期土壤湿度开沟器高寒地带播种作业覆土器划印器;
Abstract: <正> 一、冻土播种的理由及冻土播种的条件我垦区位于大兴安岭东侧的高寒地带,化冻迟,播期晚,一般在4月中旬开始播小麦。但我地区4至5月还有大雪,土壤湿度大,机械播种困难,播期拉长,有时甚至拖延到5月末至6月初,因而影响产量。另一方面,如果小麦5月中旬以后播种,那么就要在8月下旬才能收获,而这时恰是我区最大降雨期,收获困难,粮食损失严重,一般损失20%,严重时达50%。
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