当前位置: X-MOL 学术Agron. J. › 论文详情
Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)
Evaluation of irrigation scheduling approaches within sand-capped turfgrass systems
Agronomy Journal ( IF 2.1 ) Pub Date : 2022-03-22 , DOI: 10.1002/agj2.21059
Reagan Wesley Hejl 1 , Benjamin G. Wherley 2 , Kevin McInnes 2 , Chase M. Straw 2 , Charles Fontanier 3
Affiliation  

In an effort to improve performance of turfgrass irrigated with poor-quality water, the practice of sand capping is increasing. Given current strains on water supplies, evaluation of various methods of irrigation scheduling approaches for these systems is needed. The objectives of this 2-yr field study were to evaluate turfgrass performance, temporal and spatial soil moisture and salinity dynamics, and comparative water use among four irrigation scheduling approaches including (a) wireless soil moisture sensor (SMS), (b) on-site reference evapotranspiration (ETo), (c) National Oceanic and Atmospheric Administration forecasted reference evapotranspiration, and (d) visual-wilt-based treatment. The turfgrass used was ‘Latitude 36’ hybrid bermudagrass [Cynodon dactylon (L.) Pers. ×C. transvaalensis Burtt-Davy] planted atop a 17.8-cm medium-coarse textured sand cap. Results demonstrated that all approaches produced similar levels of acceptable turfgrass quality and percentage green cover with no apparent differences in root development. Forecasted reference evapotranspiration was found to be a good predictor of on-site ETo (R2 = .97) when comparing daily values across two growing seasons. Under wilt-based irrigation, the volumetric water content (7.6 cm sand-cap depth) at which wilt occurred was highest mid-summer (4.1–4.7%) but declined during early and late summer months (1.8–2.2%), suggesting different thresholds may be needed throughout the season when using SMS-based scheduling. Finally, seasonal water use was 23% lower for the on-site ETo–based approach compared with SMS-based scheduling, although this did not result in elevated electrical conductivity within the sand cap. The results provide important information to guide adoption of data-driven approaches to irrigation scheduling.

中文翻译:

沙顶草坪系统中灌溉调度方法的评估

为了提高用劣质水灌溉的草坪草的性能,沙盖的做法正在增加。鉴于当前的供水压力,需要对这些系统的各种灌溉调度方法进行评估。这项为期 2 年的实地研究的目的是评估草坪草性能、时空土壤水分和盐度动态,以及四种灌溉调度方法之间的比较用水量,包括 (a) 无线土壤水分传感器 (SMS),(b)站点参考蒸散量(ET o),(c)国家海洋和大气管理局预测的参考蒸散量,以及(d)基于视觉枯萎的处理。使用的草坪草是“纬度 36”杂交狗牙根 [ Cynodon dactylon (L.) Pers. ×C. transvaalensis Burtt-Davy] 种植在 17.8 厘米中等粗纹理沙帽上。结果表明,所有方法都产生了相似水平的可接受的草坪草质量和绿化覆盖率,而根系发育没有明显差异。预测的参考蒸散量被发现是现场 ET o ( R 2= .97) 比较两个生长季节的日值。在基于枯萎的灌溉下,发生枯萎的体积含水量(7.6 cm 沙冠深度)在夏季中期最高(4.1-4.7%),但在夏初和夏末月份下降(1.8-2.2%),表明不同使用基于 SMS 的调度时,整个季节可能都需要阈值。最后,与基于 SMS 的调度相比,基于现场 ET o的方法的季节性用水量降低了 23% ,尽管这并未导致沙帽内的电导率升高。结果为指导采用数据驱动的灌溉调度方法提供了重要信息。
更新日期:2022-03-22
down
wechat
bug