Temporal and spatial variation of morpho-physiological characteristics of spring maize under mulched drip irrigation in northeastern China

文献类型： 外文期刊

第一作者： Wang, Chuanjuan

作者： Wang, Chuanjuan;Wang, Jiandong;Wang, Chuanjuan;Zhang, Yanqun;Xu, Di

作者机构：

关键词： leaf position; maximum carboxylation rate; morpho-physiological characteristics; mulched drip irrigation; Northeastern China; photosynthesis; production of biomass; spatial variations; spring maize; temporal variations

期刊名称：CROP & PASTURE SCIENCE （ 影响因子：2.249； 五年影响因子：2.541 ）

ISSN： 1836-0947

年卷期：

页码：

收录情况： SCI

摘要： Context Leaves at different heights in a canopy have differential roles on photosynthetic characteristics and yield but have not been compared systematically under plastic film mulching with drip irrigation. Aims To determine the temporal and spatial variation of morpho-physiological characteristics in relation to the benefit of mulched drip irrigation in spring maize growth. Methods Field experiments were conducted in northeastern China during 2017 and 2018 that included mulched drip irrigation (MD), non-mulched drip irrigation (ND), and traditional non-mulched rain-fed (CK) treatments. Key results MD significantly increased lower leaf area by 13.1-62.3%, upper leaf N content (N-mass) by 6.3-13.0%, and upper leaf photosynthetic capacity (A(max)) and maximum carboxylation rate (V-cmax) by 13.4-42.3% and by 4.7-11.6%, respectively. There were close correlations between leaf physiological parameters (N-mass, carbon isotope discrimination (Delta), A(max), and V-cmax), and also between morphological parameters (leaf area (LA) with leaf mass per area (LMA), and LMA with leaf dry matter content (LDMC). As for time scale, leaf morphological parameters (LA, LMA, and LDMC) in the reproductive stage (R-stage) were higher than those in the vegetative stage (V-stage), while physiological parameters (N-mass, A(max), and V-cmax) were higher in the V-stage. This study indicated that MD treatment increased the photosynthetic area of lower leaves and the photosynthetic capacity of upper and middle leaves compared with non-mulched rainfed CK. In addition, an increase of net radiation absorbed by the canopy in MD was likely to correspond to a higher net photosynthetic rate, which was beneficial to yield accumulation in the treatment. Conclusions This study provided relevant information for the simulation of water and carbon flux under mulched drip irrigation.

分类号：

  • 相关文献
作者其他论文 更多>>

微信小程序