【作者】 李亚杰； 徐文修； 张娜； 苏丽丽； 张永强； 唐江华； 郝维维；

【Author】 LI Ya-jie;XU Wen-xiu;ZHANG Na;SU Li-li;ZHANG Yong-qiang;TANG Jiang-hua;HAO Wei-wei;College of Agronomy,Xinjiang Agricultural University;

【机构】 新疆农业大学；

【摘要】 为探明不同水氮组合对复播大豆干物质积累、氮素吸收及产量的影响,于2013年7月一10月在伊宁县进行了不同滴灌量与施氮量的裂区田间试验,滴灌量为主因子,分设3000m³·hm^-2（w1）、3600m³·hm^-2（W2）、4200 m³·hm^-2（W3）、4800m³·hm^-2（W4）四个灌水梯度;施氮量为副因子,设0kg·hm^-2（N0）、150kg·hm^-2（N1）、300kg·hm^-2（N2）三个水平。结果表明,同一施氮量条件下,随着滴灌量的增加各施氮处理干物质积累平均速率（Va）、干物质积累持续时间（T）及氮素吸收量基本表现为"先增后降"的趋势,且均在W3处理(4200m³·hm^-2)达到最大。在低水量（w1）条件下增加氮肥的投入,有利于增加复播大豆干物质积累,提高复播大豆氮素吸收量,进而提高复播大豆产量,但也降低了氮素利用效率;水分充足时适量增施氮肥能促进大豆干物质的积累,增加植株氮素的吸收量,增加氮素的利用效率,而过量追施氮肥,阻碍根系吸收氮素进入植株体内,降低氮素的利用效率,且W3N1组合条件下,干物质积累量、植株氮素吸收量、产量均达到最大,产量达到3741.23kg·hm^-2,分别比低水低肥处理（W1N0）、高水高肥处理（W4N2）增加了54.30%、17.02%。更多还原

【Abstract】 In order to study the effects of different water-nitrogen coupling on dry matter accumulation,nitrogen uptake and yield of summer soybean,a field experiment was conducted on two factors split plot experiment in Yining province during the July to October,in the split plot design,the irrigation factor was assigned to the main plot with 4 irrigation levels of 3000 m³·hm^-2（W1）,3600m³·hm^-2（W2）,4200 m³·hm^-2（W3） and 4800 m³·hm^-2（W4）,and nitrogen factor to the subplot with 3 nitrogen levels of 0kg·hm²（N0）,150 kg·hm^-2（N1） and 300kg·hm^-2（N2）.The results showed that with the increasing of irrigation quantity,the average increase rate of dry matter（V_a）,the continued days of dry matter accumulation（T） and nitrogen uptake were all presented a trend of increased first then decreased,and reached the maximum in W3.In the condition of the nitrogen input increased at low water（W1）,the dry matter accumulation,nitrogen uptake and yield were also increased while the nitrogen use efficiency reduced;under sufficient soil water condition,increased the application of nitrogen elevated dry matter accumulation,nitrogen uptake and nitrogen use efficiency,and excess nitrogen was not favorable to root absorption of nitrogen,which decreased the nitrogen use efficiency,too.In a word,the treatment W3N1 had the highest dry matter accumulation,nitrogen uptake and yield（3741.23kg·hm²）,and higher 54.30% and 17.02% than W1N0 and W4N2 in yield,respectively.更多还原