旱区集雨种植方式对土壤水分、温度的时空变化及春玉米产量的影响  

Effects of Rainfall Harvesting Planting on Temporal and Spatial Changing of Soil Water and Temperature, and Yield of Spring Maize(Zea mays L.) in Semi-Arid Areas

作　　者：李玉玲[1] 张鹏[1] 张艳[1] 贾倩民[1] 刘东华[1] 董昭芸 贾志宽[1] 韩清芳[1] 任小龙[1] 

机构地区：[1]西北农林科技大学农学院,陕西杨凌712100

出　　处：《中国农业科学》2016年第6期1084-1096,共13页Scientia Agricultura Sinica

基　　金：国家"十二五"科技支撑计划课题(2011BAD29B09;2012BAD09B03);"十二五""863"课题(2013AA102902);"十二五"公益性行业项目(201303104);陕西省科技统筹创新工程计划项目(2014KTZB02-03-02)

摘　　要：【目的】探索不同集雨种植方式春玉米旱作田土壤水分转运、分配、土壤温度的时空变化特征及其对玉米产量和水分利用效率的影响,为试区玉米高产、水分高效持续利用型种植模式提供理论依据。【方法】2013—2014年在宁夏彭阳区设置传统露地平作(CK)为对照,分析4种不同集雨覆膜种植方式下春玉米各生育期的土壤水分、土壤温度、水分利用效率及产量变化。4种集雨覆膜种植方式分别为双垄沟全覆膜种植(D)、半膜平铺种植(F)、沟播垄膜双行种植(R1)、沟播垄膜单行种植(R2)。沟播垄膜双行处理和半膜平铺处理覆膜宽度均为60 cm,沟播垄膜单行处理垄宽50 cm、沟宽10 cm,双垄沟全覆膜大垄宽70 cm,垄高15 cm、小垄宽50 cm,垄高10 cm。播种密度均为75 000株/hm2。播前基施化肥102 kg N·hm-2和90 kg P2O5·hm-2,拔节期追施153 kg N·hm-2,试验为随机区组设计,3次重复。【结果】各覆膜处理较CK可明显改善土壤水温条件,在玉米苗期(0—30 d),D、F、R1、R2处理0—200 cm土层的贮水量比CK分别增加了10%、8.9%、10.9%和14.4%。在玉米生长中后期(90—120 d),受降雨量与不同覆膜种植方式下玉米耗水量不同,各覆膜处理0—200 cm土层贮水量表现出差异,2013年(前期降水为309.4 mm)各覆膜处理显著低于CK,覆膜处理间无显著差异,2014年(前期降水为104.9 mm)R1、R2处理贮水量均显著高于其他覆膜处理。2年试验中,R1处理0—40 cm土层贮水量显著高于其他处理,平均增加了5%;D、F、R1、R2处理0—25 cm土层土壤温度在玉米苗期较CK分别增加了3.5、2.3、0.9和1.1℃;玉米全生育期总干物质积累量呈"S"型曲线,在0—60 d,积累量较小,各处理仅占整个生育期的4.3%-15.4%,各处理大小顺序为:D>R2>F>R1>CK;在60—120 d(大喇叭口期至灌浆期),积累了玉米干物质的74.5%,此期D、R2的干物质积累速率达309.3和324.1kg·hm-2·d-1;2013年(玉米全生育期降雨量【Objective】To provide a theoretical evidence for high yield and water use efficiency（WUE） of maize, the experiment was conducted to test soil moisture transportation and distribution, soil temperature, yield and WUE of dryland spring maize for determining the effects of rainfall harvesting under different planting methods.【Method】Four different plastic film mulching planting treatments were used in arid areas of Pengyang country in Ningxia in 2013-2014： double ridges and furrows both mulched with plastic film and planting in furrows（D）, flat planting of narrow film mulching（F）, plastic film mulching on ridge and planting in film-side（R1） and plastic film mulching on ridge and planting in narrow furrow（R2）. A conventional flat field without mulching was used as the control（CK）. Soil water and temperature, WUE, and yield at different growth stages of spring maize were analyzed in this study. The experiment was designed by random blocks and repeated three times. The plastic film width of R1 and F treatments were both 60 cm, furrow width of R1 was 10 cm and ridge width was 50 cm, the big-ridge width of D was 70 cm and ridges height was 15 cm, the other small one width and height were 50 cm and 10 cm. Planting density of different treatments were 75 000 plants/hm2. The amount of based fertilizer applied before sowing was N 102 kg·hm-2and P2O5 90 kg·hm-2, and topdressing was N 153 kg·hm-2. 【Result】 The results showed that the status of soil water and temperature had improved significantly in all the four plastic film mulching planting treatments compared with CK. In maize seedling period（0-30 d）, the soil water storage at depths of 0-200 cm soil layer with D, F, R1 and R2 increased by 10%, 8.9%, 10.9% and 14.4%, respectively, compared with CK. At maize mid-late stage（90-120 d）, affected by rainfall precipitation and different planting treatments, the maize water consumption was different. In addition, soil water storage in 0-200 cm soil profile showed differences： the

关 键 词：覆膜集雨种植 土壤水分 土壤温度 春玉产量 水分利用效率 半干旱区 

分 类 号：S513[农业科学—作物学]