林网生态场中玉米主要产量性状和质量性状的研究

本文试用生态场的思想，对林网中玉米（Zeamays)的主要产量性状和质量性状与生态场的内主要生态因子的关系进行了探讨，研究结果表明：林网生态场对玉米产量性状，质量性状的影响因各因子的场量和玉米的生育阶段而，开花期前较高的温度，开花期后较低的地温，最热季节不过高的温度，以及整个生长季中较高的空气湿度是提高玉米生物学产量，穗产量，籽粒产量以及籽粒中粗蛋白积累量必要的生态条件，玉米籽粒中粗脂肪含量主要受乳熟期以前生态场的影响，尤其在穗分化，形成期需较高的空气湿度和较低的地面温度，淀粉含量受生态场的影响较小，所需生态条件是拔节一蜡熟期较低的地温。总之，各时期生态场的性质均可在玉米最终的产量和质量性状中反映出来。

A STUDY ON THE MAIN CHARACTERS OF YIELD AND QUALITY OF CORN IN A SHELTER-BELT NETWOK ECOFIELD

Based on the concept of ecological field(ecofield), the relationship among the main characters of yiteld and quality of corn(Zea mays)and the ecological factors in a shelterbelt network ecofield were studied in this papar. Result showed that. In shelterbelt network ecofield,the effects of various ecological factors on the characters of yield and quality of corn varied in accordance with the field quanlity and the growth/development stage of corn. Higher temperature before the florescen.se ,and lower soil temperature after the florescense, not too high temperature over the hottest peroid, and higher air humidity during the whole growing season,were all the neccessary ecolo--gical conditions to increase the biological,ear, grain yield and the crude protein assimilation of corn grain.Crude fat content of grain was affected mainly by the ecofield before the milk-like-seed paroid, and required higher air humidity and lower earthface temperature to increase. The ecofield has smaller effect on starch content of the grain, which needs lower temperature during jointing to wax-like seed peroid. In short, the .characters of the ecofield in every peroid could be reflected by the yield and quality characters of corn in harvest time.