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ZHANG Shu-zhen;ZHANG Xian-hua;ZHU Jin-zhong
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张树振;张鲜花;朱进忠
摘要: [目的]研究地下滴灌条件下苜蓿适宜灌溉指标,为苜蓿高效节水灌溉提供科学依据.[方法]运用快速便携式测墒计测定土壤含水率,利用便携式叶绿素仪测定叶片SPAD值,使用比色卡确定叶片颜色.[结果]随土壤水分亏缺,植株含水量降低,叶片SPAD和叶片颜色指标呈上升趋势,植株干鲜重在灌溉20d后停止增长;土壤含水率与植株含水量呈极显著正相关,上部、中部叶片SPAD值与植株含水量呈极显著负相关,叶片青色和黑色指标与植株含水量呈极显著负相关.[结论]随土壤水分亏缺,上部叶片SPAD值和青色呈先升高后下降趋势,且与植株干、鲜重,植株含水率相关系数最高,有望成为适宜苜蓿生产的灌溉指标.
ZHANG Shu-zhen;ZHANG Xian-hua;ZHU Jin-zhong. A Preliminary Study on Irrigation Indexes of Subsurface Drip Irrigation in Alfalfa Fields[J]. .
张树振;张鲜花;朱进忠. 苜蓿田地下滴灌灌溉指标研究[J]. .
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