气象因子对河南省夏玉米产量与品质的影响

以郑单958、浚单20、登海662三个高产玉米品种为材料,于2007-2008年在河南省4个生态区(豫南、豫中、豫东、豫北)研究了气象因子对河南省夏玉米产量与品质的影响.结果表明:4个生态区的玉米产量表现为豫北＞豫东＞豫中＞豫南,其中豫北玉米2年平均产量为708.5kg/667m2,显著高于其他3个生态区.豫东玉米籽粒...

EFFECTS OF CLIMATIC FACTORS ON GRAIN YIELD AND QUALITY OF SUMMER CORN IN HENAN PROVINCE

Experiments with maize cultivar ZD958, XD20 and DH662 planting on farmland of four ecological area(YS, YE, YM and YN mean area in south part, east part, middle part and north part) in Henan province) were conducted  to study the effects of climatic factors on grain yield and quality of summer maize, during 2007 and 2008 Results showed that, the order of average grain yield of maize of two years was YN＞YE＞YM＞YS. Among them, the average grain yield of maize in YN was 708.5kg/667m2, which was much higher than that in the other ecological areas. Among four ecological area, the contents of crude starch, crude fat and lysine of grain in YE, crude protein in YN were higher, while crude protein, crude fat and lysine in YM were lower. The grain yield had positive correlation with illumination hours during the  whole growth stage and illumination hours per day after silking (r=0.97 and 0.92 respectively), and had a negatively correlated relationship with total rainfall during the whole growth stage (r=-0.88). The crude protein content had positively correlated relationships with illumination hours during the whole growth stage, illumination hours after silking and illumination hours per day after silking (r=0.76, 0.85 and 0.88, respectively), while the contents of crude starch, crude fat and lysine of grain had no significant correlation with climatic factors. Test showed that, sufficient illumination, illumination hours after silking and illumination hours per day after silking were the favorable factors of high yield, high quality grain in YN; rainfall more limited yield formation in YS; higher accumulated temperature, accumulated temperature after silking and accumulated temperature per day after silking were against crude starch, crude fat and lysine formation accumulation in YM; the air humidity higher in YE, was helpful for crude starch, crude fat and lysine formation accumulation.