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棗樹間接地下滴灌根區(qū)土壤鹽分運(yùn)移規(guī)律研究
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國家自然科學(xué)基金資助項目(51069013,、51369028)


Research on Salt Movement Law in Jujube Root Zone under Indirect Subsurface Drip Irrigation
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    摘要:

    通過小區(qū)試驗研究了間接地下滴灌條件下密植棗樹根區(qū)不同方向(水平及垂直方向)、不同土層鹽分質(zhì)量比的變化特征,,及導(dǎo)水裝置直徑(50,、75、90mm)和灌水量(9,、13,、17L/(棵·次))〖JP2〗對棗樹根區(qū)土壤鹽分運(yùn)移的影響。結(jié)果表明:經(jīng)過一段時間后,,垂直方向10~40cm土層鹽分質(zhì)量比較低, 0~10cm土層鹽分質(zhì)量比最高,;水平方向10~50cm各土層鹽分質(zhì)量比隨與出水口水平距離的增加而增大,。在單次灌水后導(dǎo)水裝置直徑一定時各土層脫鹽率隨灌水量的增加而增大。當(dāng)灌水量一定時,,10~40cm土層脫鹽率隨導(dǎo)水裝置直徑的增加呈減小的趨勢,,0~10cm、40~50cm脫鹽率隨導(dǎo)水裝置直徑增大呈低-高-低的趨勢,。在7—9月份,,當(dāng)導(dǎo)水裝置直徑為75mm,灌水量為13,、17L/(棵〖DK〗·次)時,,0~50cm土層土壤平均鹽分質(zhì)量比均較低而且變化幅度較小,。綜合考慮節(jié)水、抑鹽效果,,確定導(dǎo)水裝置直徑為75mm,,灌水量為13L/(棵·次)為適宜的間接地下滴灌灌溉模式。

    Abstract:

    In order to study transport and distribution characteristics of soil salinity under indirect subsurface drip irrigation, a field experiment was designed to analyze salt distribution characteristics and the effect of water conducting device diameter (50, 75, 90mm) and irrigation quantity (9, 13, 17L/plant per time) on salt transportation in jujube root zone under indirect subsurface drip irrigation. The results showed that soil salt content of 10~40cm soil layer was relatively low, and soil salt content of 0~10cm soil layer was the highest in vertical direction, while soil salt content of each soil layer showed a increasing trend with the increase of distance from the outlet in horizontal direction under treatments after a period of time. After a single irrigation, desalination rate of each soil layer increased with the increase of irrigation quantity under a certain water-conducting device diameter. Desalination rate decreased with the increase of water-conducting device diameter in 10~40cm soil layer under a certain irrigation quantity, while desalination rates in 0~10cm and 40~50cm soil layer had a trend of “l(fā)ow-high-low” with the increase of water-conducting device diameter. Soil salt content in 0~50cm soil layer was relatively low when water-conducting device diameter was 75mm, irrigation quantity was respectively 13 and 17L/plant from July to September, while soil salt content varied little. As a result, water-conducting device diameter was 75mm, and irrigation quantity was 13L/pant, which was the suitable treatment that determined with consideration of the factors of water-saving and restraining salt. The research results had a theoretical support for the water-salt regulation and reasonable irrigation schedule in jujube field in southern Xinjiang.

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孫三民,安巧霞,蔡煥杰,姚寶林,喬 英.棗樹間接地下滴灌根區(qū)土壤鹽分運(yùn)移規(guī)律研究[J].農(nóng)業(yè)機(jī)械學(xué)報,2015,46(1):160-169. Sun Sanmin, An Qiaoxia, Cai Huanjie, Yao Baolin, Qiao Ying. Research on Salt Movement Law in Jujube Root Zone under Indirect Subsurface Drip Irrigation[J]. Transactions of the Chinese Society for Agricultural Machinery,2015,46(1):160-169.

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  • 收稿日期:2014-06-27
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  • 在線發(fā)布日期: 2015-01-10
  • 出版日期: 2015-01-10
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