| 摘要: |
| 对宁南旱区春小麦覆膜穴播条件下土壤水分与产量的关系及技术决策进行了分析。结果表明:覆膜与露地条件下,春小麦产量与底墒之间均呈线性关系;在试验年份生育期降雨143.0mm情况下覆膜增收的临界土壤墒情为282mm,春小麦生育期不同降雨年型(丰:R> 130 mm,平: 70 mm
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| 关键词: 半干旱区,春小麦,覆膜穴播,土壤水分 |
| DOI： |
| 分类号:S512.104.8 |
| 基金项目:国家“九五”攻关项目部分研究内容(96-004-04-07) |
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| Cultivation technique decision on plastic mulching and hole sowing of dryland spring wheat in arid areas of South Ningxia |
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LI Mei 1 JIA Zhi kuang 2
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| Abstract: |
| The relation between soil moisture and spring wheat yield and the technique strategy on plastic film covering and hole seeding is analyzed in this paper. In the condition of covered and exposed treatment, regressive analysis on the relation between spring wheat yield and basis soil moisture shows both are linear. Further analysis shows that, in the condition of film mulching, the critical content of soil moisture which can result in income increasing is 282mm in the testyear.The different critical contents of different precipitation from March to June (plenty:R>130mm,normal 70mm≤R≤130mm, shortage:R<70mm) are 290, 290-350 and over 350mm,respectively.Cultural decision is made in accordance with these basic conclusions. |
| Key words: semiarid area,spring wheat,plastic mulching and hole sowing,soil moisture content |
