弱光照下喷施有机碳肥对小麦光合性能的影响

doi:10.12190/j.issn.2096-1197.2021.01.10

Abstract

Abstract: 【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 CO₂ 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.

Key words: Wheat, Weak light, Organic carbon fertilizer, Photosynthetic index, Photosynthetic product

CLC Number:

S512.1

SUN Lei, SUO Quanyi, ZHAO Haihong, CHEN Shuhui, KANG Wenqin. Effect of spraying organic carbon fertilizer on photosynthetic characteristics of wheat under weak light[J].Journal of Northern Agriculture, 2021, 49(1): 65-70.

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Effect of spraying organic carbon fertilizer on photosynthetic characteristics of wheat under weak light

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