水旱条件对不同燕麦品种光合特性和同化物积累的影响

doi:10.12190/j.issn.2096-1197.2021.03.03

Abstract

Abstract: 【Objective】 To study the effects of water and drought conditions on the photosynthetic characteristics and assimilate accumulation on different oat varieties.【Methods】 Using dry land varieties of oats（Yanke No. 2 and Pin No. 5）and irrigated land varieties of oats（Neiyan No. 5,Bayou No. 9）as the experimental materials,the experiment set up irrigation and dry cultivation conditions to determine the photosynthetic index and assimilation accumulation index of oats,and analyze the changes in photosynthetic characteristics and assimilate accumulation of different oat varieties under different water and drought conditions.【Results】 Under dry farming conditions,the leaf area index and photosynthetic characteristics of the four oat varieties declined to varying degrees compared with irrigation conditions. Among them,the leaf area index of the irrigated land variety Bayou No.9 was reduced by 10.07% in dry farming conditions and 34.99% lower in net photosynthetic rate compared with irrigation conditions;the net photosynthetic rate and photosynthetic potential index of dry land varieties were generally higher than those of irrigated land varieties. Dry land varieties had 15.04% higher leaf soluble sugar content at heading period than irrigated land varieties. Under irrigation conditions,the leaf area index and photosynthetic potential index of irrigated land varieties were higher than that of dry land varieties. The soluble sugar content of stems and leaves of irrigated land varieties in mature period was 27.57% lower than that of dry land varieties.【Conclusion】 The effects of water and drought conditions on the photosynthetic characteristics and material translocation of different oat varieties were significantly different. The leaves of dry land varieties had stronger photosynthetic production and assimilation capacity under dry farming conditions,while the stems and leaves translocate assimilation of irrigated land varieties was stronger than that of dry land varieties under irrigation conditions.

Key words: Oats, Photosynthetic characteristics, Material transport, Assimilate accumulation

CLC Number:

S512.6

YU Zhiguang, YAN Jie, MI Junzhen, ZHAO Baoping, LYU Pin, ZHANG Ru, WU Junying, LIU Jinghui. Effects of water and drought conditions on photosynthesis characteristics and assimilate accumulation on different oat varieties[J].Journal of Northern Agriculture, 2021, 49(3): 22-28.

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Effects of water and drought conditions on photosynthesis characteristics and assimilate accumulation on different oat varieties

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