摘要
以夏玉米为研究对象，采用水量平衡法对玉米各生育期在喷灌条件下的水量分布进行了试验和测定，计算了玉米各生育期的冠层截留量。试验结果表明：喷灌初始阶段，玉米冠层截留量随喷灌水量的增加而迅速增加，此后逐渐减缓直至达到最大冠层截留量。种植密度不同，玉米冠层截留量也不同。正常种植密度条件下，从拔节期到灌浆成熟期，冠层截留量随株高和叶面积指数的增大而线性增大，玉米拔节期到灌浆期冠层截留量在0．8～2．9mm之间变化。喷灌强度对冠层截留量的大小影响不明显。
In order to quantitatively describe the corn canopy interception, the water distribute at different growth stages were measured using a water balance method to calculate the corn canopy interception. The results showed that. the amount of corn canopy interception rapidly increased with water application at the initial stage of an irrigation event, and then reached the maximum canopy interception gradually. The corn canopy interception capacity varies from the plant intensity. In the condition of normal plant density, the amount of corn canopy interception increased linearly with plant height and leaf area index （LAI） from the jointing to the mature of summer corn. The scope of corn canopy interception capacity was 0.8～2.9 mm from the jointing stage to filling stage. Sprinkler application rate had insignificant effect on canopy interception capacity.
出处
《灌溉排水学报》
CSCD
北大核心
2008年第1期25-27,共3页
Journal of Irrigation and Drainage
基金
中国科学院重要方向项目(KZCX3-SW-444)
关键词
喷灌
夏玉米
冠层截留
水量分布
sprinkler irrigation
summer corn
canopy interception
water distribution
