施氮量对北疆滴灌复播大豆光合生理及产量的影响  

Effect of Nitrogen Levels on Physiological Characteristics and Yield of Summer Soybean in North Xinjiang under Drip Irrigation

作　　者：张娜[1] 张永强[1] 徐文修[1] 李亚杰[1] 苏丽丽[1] 彭姜龙[1] 

机构地区：[1]新疆农业大学农学院,新疆乌鲁木齐830052

出　　处：《土壤通报》2016年第3期645-650,共6页Chinese Journal of Soil Science

基　　金：农业部公益性行业专项(201103001);国家自然科学基金资助项目(31260312)资助

摘　　要：为揭示不同施氮量对北疆复播大豆光合生理及产量的影响,以黑河43为试验材料,大田滴灌条件下设置了不施氮(N0)、150 kg hm^(-2)(N1)和225 kg hm^(-2)(N2)3个处理,研究施氮量对复播大豆叶面积指数(LAI)、叶绿素含量(SPAD值)、光合速率、蒸腾速率等光合参数及产量的影响。结果表明,各处理复播大豆的LAI、SPAD值在其整个生育期内均表现为:N1>N2>N0;与N0相比,N1、N2的叶片净光合速率(P_n)、气孔导度(G_s)、蒸腾速率等(T_r)及气孔限制值(Ls)均有所增加,且各指标N1均高于N2;各处理不同生育时期胞间CO2浓度(Ci)为N0>N2>N1,叶片水分利用效率(WUEL)为N1>N0>N2。产量以N1最高,为3841.23 kg hm^(-2),分别比N0、N2处理增加了24.46%、9.04%,差异显著(P<0.05)。在本试验条件下,北疆复播大豆的适宜施氮量为0~150 kg hm^(-2)之间。The field experiment under drip irrigation was carried out to study the effects of three different nitrogen （urea） levels at 0 kg hm^-2 （NO）, 150 kg hm^-2 （N1） and 225 kg hm^-2 （N2） on physiological characteristics and yield of summer soybean. This study observed the leaf area index （LAI）, leaf SPAD, net photosynthesis rate （Pn）, transpiration rate （Tr）, stomatal conductance （Gs）, intercellular CO2 concentration （Ci） and yield. The results showed that both LAI and SPAD during the whole growth stage were all presented a trend of N1 〉 N2 〉 NO. The same trend was found on Pn, Gs, Tr and Ls, while the reverse trend was found on Ci. The WUEL was the highest in N1, and followed by NO and N2 in different growth periods. The yield in N1 （3841.23 kg hm^-2） was 24.46% and 9.04% higher than that in NO and N2, respectively. Thus, N1 was the most suitable nitrogen level for summer soybean in North Xinjiang.

关 键 词：北疆 施氮量 复播大豆 光合生理 产量 

分 类 号：S565.1[农业科学—作物学]