安徽省泾县地处皖南山区,年均降雨量虽达1516毫米,但时间分布不均,每年7～8月份少雨缺水,高温干燥,茶树遭受不同程度的旱热危害,茶叶产量低,品质差。从1980年以来,喷灌技术在该县茶叶生产上推广应用较快,主要茶区都先后建立了不同形式的茶园喷灌试点,这对提高茶叶产量与品质起到积极的作用。但在喷灌实践中也暴露了不少问题,例如,一次喷灌多少水量,增产提质效果如何等缺乏试验研究,因此,在喷灌中常常出现用水不当,不能充分发挥喷灌节水、增产的优势。为此,我们在省、地水利部门和中国农科院茶叶研究所的帮助卜,设置了早热季节不同 Jing County, Anhui Province is located in the mountains of southern Anhui, although the annual average of 1516 mm of rainfall, but the uneven distribution of time each year from July to August, lack of water, high temperature drying, tea suffered different degrees of drought heat, low tea yield, quality difference. Since 1980, sprinkler irrigation technology in the county to promote the rapid development of tea production, the main tea areas have established different forms of tea plantation sprinkler pilot, which is to improve the yield and quality of tea play a positive role. However, many problems have also been exposed in the practice of sprinkler irrigation. For example, there is a lack of experimental research on how much water to spray at a time and how to improve the yield and quality. Therefore, the improper use of water in sprinkler irrigation often can not give full play to advantages of sprinkler irrigation and water saving and yield increase. To this end, we in the province, the water sector and the Chinese Academy of Agricultural Sciences Institute of Tea help Bu, set the difference between the early hot season