ABSTRACT

Sensor-based irrigation scheduling in field crops like wheat for achieving optimum yield with minimum use of water needs investigation under different amendment practices. The present study was thus conducted to investigate the effect of four irrigation regimes i.e., soil moisture indicator (red level of indication, SMI), tensiometer (35 k Pa), IW/Pan-E 0.9, and IW/Pan-E 0.6 in main plots and four organic amendments i.e., farm yard manure (FYM), rice straw mulch, hydrogel and without amendments in subplots on soil physical properties and wheat productivity. The field experiment was laid out in split plot design with three replications during rabi 2020–21 at Research Farm, Department of Soil Science, PAU, Ludhiana. The use of SMI shows promising results in respect of scheduling irrigation in wheat as similar biological yield with same amount of water was achieved as that observed for recommended practice i.e., IW/PAN-E = 0.9. The results further indicate that the use of amendments, particularly FYM, leads to reduction in soil bulk density by 4%, while the soil moisture content at field capacity and water-holding capacity by 14% and 9.3%. It is, thus, concluded that scheduling irrigation based on SMI along with FYM in wheat is a suitable practice for northwest India.

摘要

基于传感器的大田作物灌溉调度，如小麦，以在不同的修正实践下以最少的用水需求调查实现最佳产量。因此，本研究旨在调查四种灌溉制度的影响，即土壤湿度指示剂（红色指示水平，SMI）、张力计（35 k Pa）、IW/Pan-E 0.9 和 IW/Pan-E 0.6 in主要地块和四种有机改良剂，即农家肥（FYM）、稻草覆盖物、水凝胶和不改良子地块的土壤物理特性和小麦生产力。田间试验采用裂区设计，在rabi期间重复 3 次2020-21 年在卢迪亚纳 PAU 土壤科学系研究农场。SMI 的使用在小麦调度灌溉方面显示出可喜的结果，因为在相同水量的情况下实现了与推荐实践中观察到的相似的生物产量，即 IW/PAN-E = 0.9。结果进一步表明，使用改良剂，特别是 FYM，导致土壤容重降低 4%，而田间持水量和持水能力的土壤含水量分别降低 14% 和 9.3%。因此，得出的结论是，在小麦中基于 SMI 和 FYM 调度灌溉是适合印度西北部的做法。