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首页> 外文期刊>American Journal of Experimental Agriculture >Effects of Irrigation Timing on Water Economy, Growth, and Yield of Water Stressed Cotton
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Effects of Irrigation Timing on Water Economy, Growth, and Yield of Water Stressed Cotton

机译：灌溉时间对水分胁迫棉花水分经济，生长和产量的影响

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Aims: Objectives were to evaluate the effects of timed irrigations on plant biomass and seed-cotton production, plant leaf area, whole-plant transpiration, and transpiration per unit leaf area. Study Design: A complete randomized design with four replications. Place and Duration of Study: Study was conducted in the Drought Tolerance Laboratory at the Texas A&M AgriLife Research and Extension Center near Corpus Christi, TX during the 2014 and 2015 growing seasons. Methodology: One plant per pot of the cultivar Phytogen 375 was grown in the greenhouse; pots were irrigated during nighttime with 0.5 L of a modified Hoagland’s nutrient solution to prevent pot weight changes affecting the calculations of hourly daytime transpiration. A computerized system developed to convert whole-plant transpiration from changes in pot weight included an algorithm to remove nighttime weight data “noise” related to pot weight data collection when excess water drainage occurs, that otherwise would affect hourly and daily whole-plant transpiration calculations. Results: The full irrigation treatments applied during different phenological stages had significant impact on production of biomass, leaf area, and seed-cotton, as well as whole-plant transpiration and transpiration per unit leaf area. Seed-cotton production per plant increased 49% in 2015 when irrigation was applied during MH-FB and FB-MB, but not when applied late during MB-OB. These effects could not be confirmed in 2014, although not significant numerical differences due to experimental data variation were pointing to comparable effects. Conclusion: The slope of the linear regression of seed-cotton on cumulative whole-plant transpiration (CWPT), which represents the overall impact of irrigation on plant seed-cotton production regardless of their timing, showed that seed-cotton per plant increased 1.063 and 0.554 g per L of CWPT increase in 2014 and 2015, respectively. This difference illustrates the effect of environmental conditions affecting the overall response of plant seed-cotton production to irrigation.
机译：目的：目的是评估定时灌溉对植物生物量和棉籽产量，植物叶片面积，整株植物蒸腾作用以及单位叶面积蒸腾作用的影响。研究设计：具有四个重复的完整随机设计。研究的地点和持续时间：研究在2014和2015生长季节期间在德克萨斯州科珀斯克里斯蒂市附近的德克萨斯A＆M农业生命研究和推广中心的耐旱实验室进行。方法：在温室中每盆phytogen 375栽培一种植物。夜间将0.5 L改良的Hoagland的营养液灌溉花盆，以防止花盆重量变化影响日间每小时蒸腾量。开发用于从花盆重量变化中转换整个植物蒸腾作用的计算机系统，包括一种算法，该算法可在发生过多排水时去除与花盆重量数据收集相关的夜间重量数据“噪声”，否则将影响每小时和每天的整个植物蒸腾量计算。结果：在不同的物候阶段，采用完全灌溉处理对生物量，叶面积和种子棉的产量以及整株植物的蒸腾作用和单位叶面积的蒸腾作用具有显着影响。在MH-FB和FB-MB期间进行灌溉时，2015年每株植物的籽棉产量增加了49％，但在MB-OB后期进行灌溉时则没有。尽管由于实验数据差异而导致的数值差异不大，但仍可比较，但无法在2014年确认这些效应。结论：籽棉线性回归对累积全株蒸腾量（CWPT）的斜率表示灌溉对植物籽棉产量的总体影响，而与种植时间无关，表明每株籽棉增加1.063和2014年和2015年每升CWPT分别增加0.554克。这种差异说明了环境条件影响植物种子棉生产对灌溉的总体反应的影响。

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