| 李裕,齐月,王小恒,朱青青,岳平,张强.水限制环境CO2与施氮交互作用对春小麦水分利用效率的影响[J].干旱地区农业研究,2023,(1):228~234 |
| 水限制环境CO2与施氮交互作用对春小麦水分利用效率的影响 |
| Interactive effects of CO2 and nitrogen application on water use efficiency of spring wheat in water\|limited environments |
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| DOI：10.7606/j.issn.1000-7601.2023.01.27 |
| 中文关键词: 气候变化；水限制地区 春小麦；水分利用效率；CO2浓度升高；施氮量 |
| 英文关键词:climate change water\|limited environments spring wheat water use efficiency CO2 concentration increasing nitrogen level |
| 基金项目:中国气象局兰州干旱气象研究所暨甘肃省（中国气象局）干旱气候变化与减灾重点（开放）实验室：干旱气象科学研究基金项目（IAM202105）；甘肃省自然科学基金（20JR5RA502）；国家自然科学基金重点项目（41630426） |
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| 中文摘要: |
| 在模拟大气CO2浓度升高环境条件下，进行了不同施氮处理对春小麦水分利用效率的影响试验，探索水资源限制地区提高春小麦水分利用率及其产量的途径。结果表明，CO2浓度升高与施氮交互作用对小麦产量水分利用率有显著影响。在CO2浓度升高90 μmol·mol-1环境条件下，135 kg·hm-2和315 kg·hm-2施氮处理春小麦产量的水分利用率与对照相比分别下降了5.8%和15.1%；225 kg·hm-2和405 kg·hm-2施氮处理春小麦产量的水分利用率与对照相比分别增加了9.3%和8.9%；225 kg·hm-2和405 kg·hm-2施氮处理使春小麦生物量水分利用率与对照相比分别提高了10.4%和10.8%；而135 kg·hm-2和315 kg·hm-2施氮处理造成春小麦生物量水分利用率不同程度地下降。90 μmol·mol-1CO2浓度升高与施氮处理导致春小麦千粒重水分利用率下降，其中135 kg·hm-2和315 kg·hm-2施氮处理使春小麦千粒重水分利用率较对照分别下降了13.9%和21.2%。在CO2浓度升高180 μmol·mol-1环境条件下，施氮处理对春小麦产量水分利用率的影响不显著。尽管施氮处理提高了春小麦生物量水分利用率，却导致春小麦千粒重水分利用率不同程度降低。综上可知，在未来大气CO2浓度升高背景下，可以根据CO2浓度升高幅度，从调控氮肥投入量途径入手，提高春小麦水分利用效率及其产量。 |
| 英文摘要: |
| A simulated change climatic manipulation was conducted to evaluate the effects of CO2 concentration and nitrogen level increase on water use efficiency in spring wheatat Dingxi Drought Meteorological and Ecological Environment Experimental Base of China Meteorological Administration in 2011. The objective of this study was to determine if increasing CO2 and nitrogen level would significantly change water use efficiency in spring wheat. The results revealed that the interactivity of increasing in CO2 concentration and nitrogen level led to a significant change in water use efficiency of yield in spring wheat. Compared to CK, the interaction influence of water use efficiency of spring wheat in a 90 μmol·mol-1 CO2 concentration and nitrogen application of 135 kg·hm-2 and 315 kg·hm-2 decreased by 5.8% and 15.1%, respectively. The interaction effect in a 90 μmol·mol-1 CO2 concentration and nitrogen fertilization treatment increased yield water use efficiency of 9.3% and 8.9% in spring wheat under 225 kg·hm-2 and 405 kg·hm-2, respectively. Likewise, the water use efficiency of spring wheat biomass in the nitrogen treatments of 225 kg·hm-2 and 405 kg·hm-2 decreased by 10.4% and 10.8% compared with CK, respectively. However, the nitrogen treatments of 135 kg·hm-2 and 315 kg·hm-2 decrease the water use efficiency of spring wheat biomass. The increase of 90 μmol·mol-1 CO2 concentration and nitrogen application resulted in the decrease of water use efficiency of 1000-grain weight. The water use efficiency of 1000-grain weight of spring wheatin the nitrogen treatments of 135 kg·hm-2 and 315 kg·hm-2 decreased by 13.9% and 21.2% compared with CK, respectively. A 180 μmol·mol-1 CO2 concentration and nitrogen treatments had no significant effects on water use efficiency of spring wheat biomass. Although nitrogen application increased the water use efficiency of spring wheat biomass, but it decreased the water utilization rate of 1000-grain weight in different degrees. In conclusion, the results obtained from this simulated experiment show that the interactivity of increasing in CO2 concentration and nitrogen level changed the water use efficiency dynamics in spring wheat.Regulating the fertilize amount on the base of increase of CO2 concentration should be beneficial in improving water use efficiency of spring wheat with global climate change variables. |
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