种植密度对3个玉米杂交种产量及品质的影响

2002年在吉林省梨树,以中单9409、郑单18和哲单14为试材,在30000、60000、90000和120000株/hm2种植密度下,研究了种植密度对3个玉米品种产量及子粒品质的影响。结果表明,3个品种产量的种植密度效应基本相同,产量随种植密度增加先升后降。随种植密度增加,高淀粉玉米郑单18的蛋白质含量和油分含量逐渐下降,淀粉含量上升,而蛋白质、油分、淀粉含量之和穴POSC雪呈现升-降-升的变化趋势。普通玉米哲单14蛋白质含量和POSC随种植密度增加而上升,淀粉含量下降,而油分含量呈现降-升-升趋势。优质蛋白玉米中单9409随种植密度增加POSC和油分含量呈下降趋势,而蛋白质含量和淀粉含量变化较为复杂。以上表明,玉米子粒养分含量在不同种植密度时品种间具有很大的差异。

Effects of Plant Population on the Grain Yield and Quality of Three Maize Hybrids

The effects of plant population on the grain yield and quality of three hybrids(zhongdan 9409,zhengdan18 and zhedan14) were studied under 30 000,60 000,90 000,120 000 plants/ha in northeast of China,Jilin province in 2002.The results showed that the effects of plant population on the grain yield were almost the same to all the three hybrids.The grain yield increased first and then decreased with the add of the plant population.For the hybrid of zhengdan 18(which was high starch corn),the grain protein contents and oil contents decreased and starch contents increased gradually with the add of plant population,the POSC which presented the total contents of protein,oil and starch of grain showed a curve of up-down-up with the add of the plant population.For the hybrid of zhedan 14(which was normal corn),the grain protein contents and POSC increased,starch contents decreased and the oil contents showed down-up-up with the increase of plant population.For the hybrid of Zhongdan9409(which was quality protein maize),the grain oil contents and POSC decreased,the protein contents and starch contents presented a complicated curve with the add of plant population.It is suggested that the effects of plant population on the grain nutrition component varied by corn hybrids.