| 王同朝,杜园园,卫丽,王燕,王俊忠.雨养旱作区垄作小麦减产原因初步分析[J].干旱地区农业研究,2008,(6):38~43 |
| 雨养旱作区垄作小麦减产原因初步分析 |
| Mechanism of yield formation and decrease of winter wheat yield in bed-planting in rain-fed areas |
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| DOI：10.7606/j.issn.1000-7601.2008.06.07 |
| 中文关键词: 雨养旱作区 垄作 冬小麦 减产 |
| 英文关键词:ain-fed area bed-planting winter wheat decrease yield |
| 基金项目:国家“十一五”科技支撑计划项目(2006BAD02A07) |
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| 中文摘要: |
| 在降雨偏少的雨养旱农区条件下,研究了垄作、平作、垄作覆盖、平作覆盖四种处理对冬小麦产量的影响。试验结果表明,前期土壤水分严重胁迫造成中后期垄作小麦生长发育不良。同对照平作相比,垄作冬小麦整个生育阶段群体总数低7.1%～14.6%,叶面积指数减少8.1%～16.3%,干物质积累降低0.4%～27.3%,物质运转分配不合理,限制群体边际增产作用发挥,导致小麦减产7%～10%。因此,在我国北方雨养旱作区,垄作小麦栽培技术推广应用成功与否取决当地降雨年型。偏旱条件下,不宜采用。 |
| 英文摘要: |
| Winter wheat in bed-planting in rain-fed areas with severe drought was seriously stressed by soil water decreasing as crop growth and development.An experiment was carried out to study the effects of bed-planting and mulching system,bed-planting system,flatting culture practice and and flatting culture with mulching on the yield of winter wheat.The results showed that,compared with the control,the yield decreased by 7%～10%,mainly because of total population,LAI,and dry matter accumulation decreasing by 7.1%～14.6%,8.1%～16.3% and 0.4%～27.3%,respectively.Moreover,dry matter contribution was unreasonable,and the potential of edge effects for yield increase was rather limited under the case,causing a yield decrease by 7%～10%.So,whether the technology of bed-planting applying in rain-fed areas is successful or not mainly depends on the special condition of the annual rainfall,and the bed-planting is not suitable for severely dry areas. |
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