摘要
利用结构、性能完全相同的9个开顶式气室(OTC),开展了大田试验条件下地表臭氧浓度增加对大豆干物质(DM)生产和产量的影响研究。实验设置三个处理:CK为未经处理的空气,T1处理的O3浓度为100nL.L-1,T2处理的O3浓度为150nL.L-1。结果表明:不同浓度臭氧熏气下,不同生育期大豆干物质重、根瘤数、根瘤干重,鼓粒期根茎的转运率和移动率均显著下降(P<0.05)。100nL.L-1臭氧处理对叶片转运率和鼓粒期-成熟期干物质生产速率影响不显著;150nL.L-1臭氧熏气下,大豆结荚出现时间推迟,叶片转运率和鼓粒期-成熟期干物质生产速率均显著下降。臭氧浓度升高显著降低大豆的单株粒数、粒重及产量,但对百粒重没有显著影响。以上结果表明,100nL.L-1臭氧熏气下大豆产量显著下降的主要原因是干物质生产速率下降;而150nL.L-1臭氧熏气下大豆产量显著下降,是由于干物质转移受抑制和干物质生产速率下降共同导致的。
The experiment was conducted to reveal the impact of surface ozone(O3)concentration increasing on dry matter production and yield of soybean,by using 9 OTCs with same structure and function.3 treatments were exposing to unfiltered air(CK),ozone concentration with 100nL·L^-1(T1)and 150nL·L^-1(T2) respectively.The results showed that dry matter production,number of root nodule,root noodle weight,translation rate and movement rate of root/stem decreased significantly under T1 and T2(P0.05).T1 had no significantly effect on the translation rate of leaf in the filling stage and dry matter production rate in later filling stage.The pod appearing delayed and dry matter production rate in later filling stage decreased significantly under T2.Elevated O3decreased significantly grains number and grains weight per plant and yield,but no effect on the weight per 100 seeds.The results indicated that the yield decreasing resulted from dry matter production rate decreasing under T1,and dry matter translation restraining and dry matter production rate decreasing under T2.
出处
《中国农业气象》
CSCD
2011年第1期73-80,共8页
Chinese Journal of Agrometeorology
基金
国家自然科学基金面上项目(40775072
41075114)
江苏省高校自然科学研究重大项目(09KJA170004)
中国气象局农业气象保障与应用技术重点开放实验室开放基金项目(AMF200904)
南京信息工程大学科研基金(90215)
关键词
臭氧
大豆
干物质生产
干物质分配
Ozone(O3)
Soybean
Dry matter production
Dry matter distribution