在两个N-Fertigation水平下,CO2度对番茄气交换,根形态和用水效率的影响
Manyi Zhang1, Wentong Zhao1, Chunshuo Liu1
1Key Laboratory of Agricultural Soil and Water Engineering in Arid and Semiarid Areas of Ministry of Education, Northwest A&F University, Yangling 712100, China.
Plants (Basel, Switzerland)
|September 14, 2024
概括
大气中的二氧化碳含量增加,缺水灌和化肥减少,提高了西红植物的用水效率 (WUE). 这种组合增强了对未来气候条件的增长和水资源管理策略.
科学领域:
- 植物生理学 植物生理学
- 农业科学 农业科学
- 环境科学 环境科学
背景情况:
- 大气中二氧化碳 (e[CO2]) 的升高会减少植物 (N) 的含量,并提高用水效率 (WUE).
- 肥料增强了作物营养和WUE,但在赤字灌下与e[CO2]的相互作用效应尚不清楚.
- 了解这些相互作用对于优化在不断变化的环境下作物管理至关重要.
研究的目的:
- 研究番茄植物在赤字灌和不同N-fertigation水平下对e[CO2]的生理和生长反应.
- 探索e[CO2] (800 ppm) 和N-fertigation (完全或缺水灌;减少或充足N) 对气体交换,根形态和WUE的综合影响.
主要方法:
- 番茄植物是在环境[CO2] (a[CO2],400 ppm) 和e[CO2] (800 ppm) 的条件下种植的.
- 应用了两个N-fertigation制度:完全灌 (FIN) 和缺陷灌 (DIN).
- 与灌方案一起使用了两种N化肥水平 (减少N1: 0.5g/;适当的N2: 1.0g/).
主要成果:
- 通过DIN和N2施肥的e[CO2]减少了水的使用,同时保持了叶子水的潜力和液压导电性.
- 这种组合显著增加了番茄的生长,包括叶面积,特定叶面积和干物质积累.
- 在e[CO2]和DIN下降的N (N1) 导致口腔更小,更密集,口腔导电和透气减少,并增强WUE,特别是在整个植物水平.
结论:
- 增加二氧化碳,缺水灌和减少肥 (N1) 的结合优化了番茄植物的用水量,并增强了生长.
- 这一策略通过减少口腔导电和透气而改善WUE,同时保持生理功能.
- 调查结果为优化水和管理提供了宝贵的见解,预计未来的资源有限和CO2丰富的场景.
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