小量播种条件下冬小麦的产量效应

Effects of small amount precision seeding on winter wheat yield.

20 0 1～ 2 0 0 3年在北京进行了 2个年度的秋播 ,研究冬小麦在小量播种条件下的产量效应 .结果表明 ,在 2 2 5kg·hm-2 播量处理中 ,DS1号和临抗 1号的平均最高产量分别达 6 836 2 5和 735 3 75kg·hm-2 ,在一些重复小区中 ,产量超过 75 0 0kg·hm-2 .小量播种试验中 ,参试品种有正常的生育表现 .麦苗的总糖、脯氨酸、赖氨酸含量较高 ,单株分蘖能力强 .旗叶净光合速率、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 ,表明植株代谢活性较强 .在产量结构中 ,单株穗数多 .在小量播种生产中 ,品种选择是前提 。

A two-year autumn seeding experiment was conducted during 2001～2003 in Beijing to study the effects of small amount precision seeding on winter wheat yield.When the seeding amount was 22.5 kg·hm -2,the best average yield of winter wheat varieties DS No.1 and Linkang No.1 was 6 836.25 and 7 353.75 kg·hm -2,respectively,and some experimental plots had a yield surpassed 7 500 kg·hm -2.The test varieties had a normal expression of growth and development in their growth period,and the contents of total saccharide,proline and lysine in seedlings were higher,and the tillering ability of plant was stronger than the control.The net photosynthesis and transpiration rates,RS,COND and CINT of flag leaf showed the vigorous physiological functions of the plants,and the higher activities of nitrate reductase and SOD showed their stronger metabolism activity.There were more spikes per plant for the test varieties.In practicing small amount precision seeding,variety selection is the prerequisite,and sowing amount is the heart of the matter.