高密度栽培条件下化控处理对玉米光热水利用效率的影响

Effect of Chemical Control Treatment on the Utilization Efficiency of Light,Heat and Water by Corn Planted at a High Density

为研究高密度条件下化控对玉米光热水利用效率的影响,选用鲜食玉米为试验材料,以清水为对照,设置玉黄金、高玉保和吨田宝3个化控处理,研究玉米光合特性、干物质积累量、产量及光温水资源利用率。结果表明:化控显著提高了叶片叶绿素含量和净光合速率,增加了干物质积累量,提高了光热水利用效率和玉米产量;玉黄金处理下效果最好,产量增加15.52%。因此,在高密度种植条件下,使用玉黄金进行化控能够显著改善鲜食玉米光合条件,提高干物质积累量、光热水利用效率和玉米产量。

In order to study the effect of chemical control on the utilization efficiency of light and hot water by corn planted at a high density,Xianyunuo 4,a fresh-eating waxy corn variety,was treated with chemical control agents,Yuhuangjin,Gaoyubao and Tuntianbao,by spraying at the 6th leaf stage with water as control.Photosynthetic characteristics,dry matter accumulation,yield,and utilization of light,temperature and water of the corn were analyzed.The results showed that chemical control agents significantly increased leaf chlorophyll content and net photosynthetic rate,increased dry matter accumulation and improved utilization efficiency of light and water,and yield.The Yuhuangjin treatment showed the best effect,and increased the corn yield by 15.52%.Therefore,under high-density planting conditions,Yuhuangjin used for chemical control can significantly improve the photosynthesis and dry matter accumulation of the fresh eating waxy corn,and increase the utilization efficiency of light,heat and water,and yield.