Grain yields and evapotranspiration dynamics of drip-irrigated maize under high plant density across arid to semi-humid climates
文献类型： 外文期刊
作者： 王凤;;肖俊夫;;明博;;谢瑞芝;;王克如;;侯鹏;;刘广周;;张国强;;陈江鲁;;刘万茂;;杨云山;;秦安振;;李少昆
作者机构：
关键词： Mulched drip irrigation;;Drought indices;;High yields;;Water requirement;;Zea mays L
期刊名称： Agricultural Water Management
ISSN： 0378-3774
年卷期： 2020 年
页码：
收录情况： JCR（2021版） ; EI（2021版）
摘要： Global water shortage has been a non-negligible issue threatening the sustainable development of agriculture and food security. To alleviate the contradiction between food desire and water limit, a synergistic improvement in grain yields (GY, kg ha− 1) and water use efficiency (WUE, kg m− 3) should be achieved. In this study, a combination of mulched drip irrigation and a high-yield maize cultivation system with high plant density (12 × 104 plants ha− 1) was introduced to achieve the dual goal of high yields and water-saving. The study aims at identifying optimal irrigation quotas for three climatic conditions, i.e., Changji, an arid region (annual precipitation 141 mm), Qitai, a semi-arid region (269 mm), and Xinyuan, a semi-humid region (476 mm). Field experiments were carried out to explore dynamics of crop evapotranspiration (ETc, mm) of maize across arid to semi-humid climate, in 2018 and 2019. Six experimental treatments were designed according to local precipitation, including five irrigation levels under a high plant density of 12 × 104 plants ha− 1, and a conventional irrigation level under a common planting density of 9 × 104 plants ha− 1 taken as the control. There existed a quadratic relationship between GY and irrigation amounts, and between GY and ETc. A negative linear relationship was observed between WUE and irrigation amounts, and between WUE and ETc. Daily water consumption intensity (DWCI, mm d− 1) of maize increased from VE to VT stage, reached maximum values of 9.3 mm d− 1 (Changji), 6.4 mm d− 1 (Qitai), and 5.0 mm d− 1 (Xinyuan), respectively, during VT to R3 stage, and then declined until maturity, indicating that VT to R3 stage is a high water consumption period (water sensitive period) of maize. Generally, the occurrence of maximum DWCI and its sensitive period were delayed with increase of precipitation from arid to semi-humid climate. The optimum irrigation quota recommended was 720 mm for Changji, 540 mm for Qitai, and 180 mm for Xinyuan, respectively. Compared to the control, the recommended irrigation quota saved 11–60% irrigation water, and improved average WUE by 11–65%, without sacrificing maize yields (>15 M ha− 1). We conclude that dual goal of high yields and high WUE of maize can be achieved with high plant density using optimal irrigation quotas and regimes, especially under semi-arid climate.
分类号：
- 相关文献
作者其他论文 更多>>
-
Regional projections and sampling strategies for the global germplasm resources collection of Oryza rufipogon Griff.
作者：王恺;;龙金花;;雷济舟;;梁云涛;;钱前;;郑晓明
关键词：Oryza rufipogon Griff.; Germplasm resource collection; Genetic diversity; Environmental factor; MaxEnt model
-
High-density cultivation of synthetic apomictic hybrid rice achieves near-complete 1 diploidization and parental-equivalent yield in field trials 2 Mengqiu Song1,5, Shengnan Li1,5, Zuan Wang1,5, Guojun Dong2 , Tao Wang1 , Jingxi Sun1 ,
作者：宋梦秋;;李胜男;;王钻;;董国军;;王涛;;孙景熙;;夏思琪;;杨泽园;;刘伟哲;;彭友林;;樊龙江;;孙健;;张勇;;王克剑;;郑晓明;;钱前
关键词：cultivation;;hybrid rice;;near-complete ;;diploidization;;parental-equivalent
-
Genome-wide identification of the Medicago ruthenica FTIP gene family and expression profiling under salt stresses
作者：田永雷;;朱琳;; 郭茂伟;;李志勇;; 武自念;;李鸿言;; 李星月;;王晓龙
关键词：FT-interacting proteins; Medicago ruthenica; genome-wide identification; salt stress; saline–alkali stress
-
Deciphering the ceRNA Network in Alfalfa: Insights into Cold Stress Tolerance Mechanisms
作者：朱琳;;赵宇杰;;郭茂伟;;白杰;;张良斌;;李志勇
关键词：alfalfa; cold stress; mRNAS; ncRNAs; ceRNAs
-
The threshold of aeration intensity in micro-oxygen lactic acid fermentation and the underlying microbial mechanisms
作者：曹起涛;;尹福斌;;连天境;;周谈龙;;蔡阳扬;;魏晓曼;;孙佳欣;;董红敏
关键词：agricultural waste; lactic acid; micro-oxygen; aeration threshold; microbial function
-
Strengthening global rice germplasm sharing: insights from the International Network for the Genetic Evaluation of Rice (INGER) platform
作者：樊佳雨;;夏思琪;;杨泽园;;郑晓明;;陈帆
关键词：ice germplasm resources · INGER · Sharing mechanism · Sustainable agricultural development
-
Contrasting effects of three aging processes on arsenic immobilization in red versus black soils amended by cerium-manganese modified biochar: the unique role of freeze-thaw cycling in governing arsenic fate at micro/nano interfaces
作者：吕鹏;;黄晓雅;;李莲芳*;;焦艳
关键词：Modifed biochar; Aging mechanism; Arsenic fate; Freeze–thaw cycling; Soil micro-interfaces