摘要
在东北雨养农业区,地膜覆盖和玉米密植高产栽培技术得到广泛应用。本文探讨了不同种植密度条件下,地膜覆盖对玉米田间土壤水分及其产量的影响。研究设置60000、67500和75000株·hm-23个种植密度,分析玉米田间土壤水分动态及其产量变化。结果表明:3个种植密度下玉米全生育期土壤含水率变化趋势基本一致,在拔节期至灌浆期,种植密度对土壤水分的影响明显;同一密度下,覆膜玉米产量明显高于不覆盖玉米产量,密度在60000株·hm-2时增产率最大(14.3%);不覆盖模式下不同种植密度间水分利用效率差异不显著,覆膜模式下不同密度间水分利用效率差异显著;分析表明,提高玉米种植密度或者采用覆膜种植模式,均可以增加玉米产量,但同时也会导致土壤库存水量降低。
High-yielding cultivation techniques such as plastic film mulching and high density planting are being used widely in northeast China in recent years, especially in those rain-fed ag- ricultural regions. In this paper, the effect of plastic film mulching and planting density on corn yield and field soil moisture was studied in a rain-fed agricultural region of Shenyang, Liaoning Province. The dynamic changes of soil moisture and corn yield were investigated in fields at three planting densities （60000, 67500, and 75000 plants · hm-2） with/without film mulching. Con- sistent trends in soil moisture were observed for the different planting densities through the whole age.
出处
《生态学杂志》
CAS
CSCD
北大核心
2014年第10期2650-2655,共6页
Chinese Journal of Ecology
基金
国家公益性行业(农业)科研专项(201303125)
辽宁省教育厅高校科研项目(2009A630)资助
关键词
地膜覆盖
春玉米
种植密度
土壤水分
产量
plastic film mulching
spring corn
planting density
soil moisture
yield.
