不同埋深地下微咸水用于夏玉米灌溉研究

目的]探讨不同地下水埋深下适合夏玉米灌溉的微咸水浓度。方法]以浚单20号为供试材料，利用地中蒸渗仪控制不同地下水埋深（2、3、4m），在灌水定额为900m^3／hm^2条件下利用不同浓度微咸水（1．5、2．5、3．5、4．5g／L）对夏玉米进行灌溉试验，测量夏玉米的叶面积指数、株高、产量等生育指标，研究不同地下水埋深下适合夏玉米灌溉的微咸水浓度。结果]地下水埋深与夏玉米叶面积指数、株高和产量呈负相关，其中地下水埋深4m对夏玉米的影响最大；微咸水浓度与夏玉米叶面积指数、株高和产量呈负相关，其中4．5g/L微盐水灌溉对夏玉米影响显著。结论]地下水埋深为2m时，适合灌溉的微咸水浓度不宜超过3．5g/L；地下水埋深分别为3、4m时，适合灌溉的微咸水浓度不宜超过2．5g／L。

Study on the Irrigation of Summer Maize with Underground Brackish Water from Different Buried Depths

Objective] The purpose was to discuss the concn.of brackish water from different groundwater depths suitable for irrigating summer maize.Method] With Xundan 20 as tested materials,the center steams infiltration meter was used to control different groundwater depth(2,3,4 m),the irrigation experiments were carried out on summer maize by using brackish water with different concn.of 1.5,2.5,3.5 and 4.5 g/L under the condition that the irrigation quota was 900 m3/hm2.Some growing indexes of summer maize such a...