盐胁迫下施肥对棉花生长及氮素利用的影响

应用生态学报

盐胁迫下施肥对棉花生长及氮素利用的影响

代建龙^1,2,卢合全¹,李振怀¹,段留生²,董合忠^1**

(¹山东省农业科学院山东棉花研究中心/黄淮海棉花遗传改良与栽培生理重点实验室, 济南 250100; ²中国农业大学作物化学控制研究中心, 北京 100091)

出版日期:2013-12-18 发布日期:2013-12-18

Effects of fertilization on cotton growth and nitrogen use efficiency under salinity stress.

DAI Jian-long^1,2, LU He-quan¹, LI Zhen-huai¹, DUAN Liu-sheng², DONG He-zhong^1

(¹Cotton Research Center, Shandong Academy of Agricultural Sciences/Key Laboratory of Cotton Breeding and Cultivation in HuangHuaiHai Plain, Ji’nan 250100, China; ²Crop Research Center for Chemical Regulation, China Agricultural University, Beijing 100091, China)

Online:2013-12-18 Published:2013-12-18

摘要/Abstract

摘要： 利用海水配制不同含盐量(0、0.15%、0.3%)的土壤盆栽棉花,在可移动遮雨棚内研究了不同施肥(N、NK、NP、NPK)处理对棉花生长、氮素吸收与利用的影响.结果表明: 盐胁迫和施肥均影响棉花生物产量、棉株氮素农学利用效率、氮素生物利用效率和氮素积累量,且两者存在显著的互作效应.施肥能提高盐胁迫下棉株氮素利用效率及氮素积累量,并显著增产,不同施肥处理中以N、P、K肥料配合施用的效果最好;施肥效果受盐胁迫程度的影响,低盐胁迫(0.15%)下的施肥效果好于中度盐胁迫(0.3%).

Abstract: Cotton (Gossypium hirsutum) was raised at different salinity levels (0, 0.15% and 0.30%) by irrigating with fresh or seawater. The effects of fertilization (N, NK, NP and NPK) on plant growth, nitrogen (N) uptake and N use efficiency were studied. The results showed that salinity and fertilization both affected the biomass, agronomic N use efficiency, N bioavailability and nitrogen accumulation of plants, and significant interaction was observed between the two factors. Fertilization could improve N use efficiency and nitrogen accumulation of plants under salinity stress, and significantly promoted the cotton yield. Among the fertilization treatments, N combined with P and K had the best effect. The benefit of fertilization was better under low salinity (0.15%) than under moderate salinity (0.3%).

代建龙1,2,卢合全1,李振怀1,段留生2,董合忠1**. 盐胁迫下施肥对棉花生长及氮素利用的影响[J]. 应用生态学报.

DAI Jian-long1,2, LU He-quan1, LI Zhen-huai1, DUAN Liu-sheng2, DONG He-zhong1. Effects of fertilization on cotton growth and nitrogen use efficiency under salinity stress.[J]. Chinese Journal of Applied Ecology.