种植密度对玉米先玉335和郑单958生理特性、产量的影响

The Effect of Plant Density on the Physiological Characters and Yield of Maize Xianyu 335 and Zhengdan 958

在河北省太行山山前平原条件下,通过大田试验研究了不同种植密度对玉米先玉335和郑单958生理特性和产量的影响。结果表明,随着种植密度增加,叶绿素相对含量降低,叶面积指数(LAI)增大,群体光合势增加,群体干物质积累量呈现升高趋势,但单株干物质积累则呈现降低趋势;产量呈现先增后降趋势。玉米群体和个体的产量性状相对较为协调的种植密度为:先玉335为7.5万株/hm2、郑单958为6万株/hm2。

The effect of different plant density on physiological characters and yield of maize was studied by field experiment under Taihangshan Mountain of Hebei ecological conditions.The result showed that the relative chlorophyll content,single dry matter weight decreased and community leaf area index,photosynthesis potential,community dry weight increased as well as the yield showed a curve of first increase and later drop as plant density increased.It is suggested that the high yield of Xianyu335 and Zhengdan958 had earned in plant density 75 000 plants/ha and 60 000 plants/ha respectively.