A STUDY ON THE MAIN CHARACTERS OF YIELD AND QUALITY OF CORN IN A SHELTER-BELT NETWOK ECOFIELD
林网生态场中玉米主要产量性状和质量性状的研究

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.