摘要
【目的】探究在弱光照下喷施不同有机碳肥对小麦光合性能的影响,为有机碳肥在不良条件下应用提供参考。【方法】以小麦品种永良4号为材料进行盆栽试验,拔节期进行遮光控制(自然光照的60%),叶面喷施蔗糖(SUC)、腐植酸(HA)、氨基酸(AA),喷施清水(W)为对照,喷施后的2、5、10 d进行光合指标和光合产物的测定。【结果】弱光照下,喷施SUC、HA和AA 10 d后小麦SPAD值分别较对照提高4.03%、3.63%、3.51%;喷施SUC、HA和AA 2 d后净光合速率(Pn)分别较对照提高32.04%、20.61%、23.91%,5 d后分别较对照提高34.30%、9.76%、4.75%,喷施SUC 10 d后Pn为对照的2.5倍,且差异显著(P<0.05);喷施SUC 5 d后蒸腾速率(Tr)、气孔导度(Gs)、胞间CO_(2)浓度(Ci)分别较对照提高13.81%、30.07%、14.03%。喷施SUC、HA和AA 10 d后可溶性糖含量分别较对照提高33.20%、18.90%和31.96%,蔗糖含量分别较对照提高11.04%、43.56%和22.70%。【结论】叶面喷施有机碳肥可以弥补小麦光照不足导致的碳代谢受阻,从而提高小麦叶片的光合特性和光合产物含量。
【Objective】Explore the effects of spraying different organic carbon fertilizers on photosynthetic characteristics of wheat under weak light conditions,and provide a reference for the application of organic carbon fertilizers under adverse conditions.【Methods】Potted experiment with wheat variety Yongliang No.4 as the test material,shading control at jointing stage(60%of natural light),foliar spraying of sucrose(SUC),humic acid(HA),amino acid(AA),and spraying water(W)as control.And the photosynthetic index and the photosynthetic product were measured at 2,5,10 days after spraying.【Results】Under weak light,the SPAD value of wheat after spraying SUC,HA and AA for 10 days increased by 4.03%,3.63%,3.51%respectively compared with the control.The net photosynthetic rate(Pn)after spraying SUC,HA and AA for 2 days increased by 32.04%,20.61%,23.91%compared with the control,and increased by 34.30%,9.76%,4.75%respectively after 5 days.Spraying SUC for 10 days Pn was 2.5 times that of the control,and the difference was significant(P<0.05).The transpiration rate(Tr),stomatal conductance(Gs),and intercellular CO_(2) concentration(Ci)after spraying SUC for 5 days increased by 13.81%,30.07%,and 14.03%respectively compared with the control.The soluble sugar content increased by 33.20%,18.90%and 31.96%after spraying SUC,HA and AA for 10 days compared with the control;the sucrose content increased by 11.04%,43.56%and 22.70%respectively after spraying SUC,HA and AA for 10 days compared with the control.【Conclusion】Foliar spraying of organic carbon fertilizer could compensate for the obstruction of carbon metabolism caused by insufficient photosynthesis of wheat under weak light,and could increase the photosynthetic index and photosynthetic product content of wheat leaves.
作者
孙蕾
索全义
赵海宏
陈淑慧
康文钦
SUN Lei;SUO Quanyi;ZHAO Haihong;CHEN Shuhui;KANG Wenqin(College of Grassland,Resources and Environment,Inner Mongolia Agricultural University/Inner Mongolia Key Laboratory of Soil Quality and Nutrient Resource,Hohhot 010011,China;Inner Mongolia Academy of Agricultural and Animal Husbandry Sciences,Hohhot 010031,China)
出处
《北方农业学报》
2021年第1期65-70,共6页
Journal of Northern Agriculture
关键词
小麦
弱光照
有机碳肥
光合指标
光合产物
Wheat
Weak light
Organic carbon fertilizer
Photosynthetic index
Photosynthetic product
