【摘要】 2001-2003年在北京进行了2个年度的冬小麦小量播种秋播试验。2001-2002年,在22.5kg/hm2播量中,参试品种DS1号的最好产量是5589.0kg/hm2。2002-2003年度,在22.5kg/hm2播量处理中,京411、鲁麦21、晋麦73、DS1号的产量分别达到8537.7、7403.7、7353.75和6836.25kg/hm2。试验中,旗叶的净光合速率、蒸腾速率、气孔阻力、CO2传导度和叶肉细胞CO2浓度表明植株的生理功能较旺盛。硝酸还原酶和超氧化物歧化酶活性较高,表明植株代谢活动较强。在产量构成因素中,这些品种的单株穗数较多。更多还原

【Abstract】 The Autumn-sown experiments in the precision seeding of small sowing amount for the winter wheat in two years were conducted during 2001 - 2003 in Beijing. The best yield for the DS 1 came to 5589.0 kg/hm2 at the sowing level of 22.5 kg/hm2 seeds from 2001 to 2002. The yield of Jing 411, Lumai 21, Jinmai 73 and DS 1 came to 8537.7, 7403.7, 7353.75 and 6836.25 kg/hm2, respectively at the sowing level of 22.5kg/hm2 seeds during 2002 - 2003. Rate of net photosynthesis, rate of transpiration, RS, COND and CINT in flag leaves showed that plants had vigorous physiological functions. Higher activities of nitrate reductase and SOD showed that plants had stronger metabolism. The number of spike per plant among yield components in these cultivars was relatively high.更多还原