山地梨枣树涌泉根灌适宜布置方式与灌水量研究

【目的】研究确定山地梨枣树涌泉根灌的适宜布置方式与灌水量。【方法】以5年生梨枣树为试验树种,设置了4种灌水器布置方式(每株梨枣树安装1,2,3或4个灌水器)和3种灌水量水平(单株梨枣树单次灌水60,80,100L)共12个处理(T1-T12),研究涌泉根灌的不同布置方式和灌水量对山地梨枣树耗水量、水分利用效率及产量的影响。【结果】涌泉根灌不同布置方式和灌水量对梨枣树耗水量有一定影响,各处理梨枣树的耗水量为368.5～423.9mm;不同布置方式和灌水量下,梨枣树的水分利用效率、产量、年净增效益有一定差别;各处理总水分利用效率(WUEET)为3.7～4.3kg/m3,灌溉水利用效率(WUEM)为22.5～38.0kg/m3,各处理之间差异显著;安装2或3个灌水器的布置方式与80,100L的灌水量组合,均可使梨枣树产量达到17000kg/hm2以上,且显著高于其他处理。【结论】山地梨枣树涌泉根灌时,每株2个灌水器的布置方式与单株单次80L的灌水量组合,梨枣树的增产效益最明显,净增效益达18856元/(hm2.年),是山地梨枣树涌泉根灌的最佳布置方式与灌水量水平。

Appropriate surge spring root irrigation layout and irrigation norm of ujube on mountain land

Objective] The research was done to study the appropriate emitter layout and irrigation norm of surge spring root irrigation for mountain land jujube trees.Method] With five-year-old pear-jujube trees as test material,the experiments were carried out including four emitter layouts(1,2,3,and 4 emitters per tree,respectively)and three irrigation norms(60,80,and 100 L per tree each time,respectively),totally 12 treatments to study the emitter layout and irrigation norm of surge spring root irrigation effect ...