密度对耐密性不同玉米品种群体冠层结构的影响

Effects of Density on Different Varieties of Maize Population Canopy Structure

以郑单958、沈单16为试验材料,研究了种植密度对耐密性不同玉米品种冠层结构的影响。结果表明:随着密度的增加,不同耐密性品种的叶面积指数、叶向值增大,叶倾角、冠层透光率降低;在同一密度下,耐密玉米品种的叶倾角较小、叶面积指数和叶向值较大、冠层透光率高;耐密品种群体冠层结构合理,增产潜力大。不同耐密性玉米品种产量对密度的反应截然不同,所以获得高产的适宜密度存在差异。

Thisstudy was to examine the effects of density on different varieties ture. Two maize varieties,Zhengdan958 and Shendanl6 were used in this field of maize population canopy struc- experiment. The resuhs show that： With the increase in density, two varieties＇ LAI, leaf orientation value increaseed and leaf angle, canopy light trans- mittance rate decreased. Under the same density, the leaf angle of the density tolerantmaize varieties was smaller, and their leaf area index and leaf canopy transmittance were higher. Density-tolerant maize varieties group canopy structure was reasonable, which could improve the yield of the maize. It was found that the yield in different maize varieties had different responses to densities, and the suitable densities for the highest yield changed a lot among the varieties.