摘要
以遮光率分别为70%,50%,30%的黑色遮阳网为试验材料,以不遮光（0%）为对照,研究高温干旱季节不同遮光处理对茶园生态环境的影响。结果表明,遮阴可有效改善茶园生态环境,且遮光率越高,效果越明显。与对照茶园相比,70%,50%,30%遮光率处理的茶园光合有效辐射明显降低,各处理的光合有效辐射大小依次为70%遮光率〈50%遮光率〈30%遮光率〈0%（CK）;茶树叶面的日平均温度均比对照茶园低3.4,2.6,1.3℃,茶树叶面≥35℃的不适高温出现频率减少了43.6%,38.0%和13.4%,≥39℃的有害高温出现频率减少了62.6%,47.5%和28.8%;遮阴茶园空气相对湿度高于对照茶园;70%和50%遮光率处理茶园不同土层土壤含水量均极显著高于对照茶园,30%遮光率处理茶园5～10 cm、15～20 cm、25～30 cm土层土壤含水量和对照茶园差异不显著。
In order to analyze the effect of different shading treatments on the eco-environment of tea plantation during hot dry season, 70%,50%,30% and 0%（CK） black shading nets were designed. The results showed that shading improved the eco-environment of tea plantation, the effect were enhanced with increase in shading degree. In comparison with unshaded tea plantation, the photosynthetically active radiation of tea plantation under 70%, 50% and 30% shading treatments decreased significantly, and the photosynthetically active radiation of different treatments was in the order of 70%〈50%〈30%〈0%;the daily average air temperature of tea leaves surface decreased by 3.4,2.6 and 1.3 ℃; the frequency ≥35 ℃ dangerous high temperature of tea leaves surface decreased by43.6%,38.0% and 13.4%,the frequency ≥39 ℃ dangerous high temperature decreased by 62.6%,47.5% and28.8%;the relative air humidity of tea plantation increased;for 70% and 50% shading treatments, the soil water contents of different soil horizons were significantly higher than that of unshaded tea plantation, the soil water contents of 5 ～10 cm,15 ～20 cm and 25 ～30 cm soil horizons had no significant difference between 30% shading treatment and unshaded treatment.
出处
《天津农业科学》
CAS
2015年第11期115-118,共4页
Tianjin Agricultural Sciences
基金
国家现代农业产业技术体系建设专项(CARS-23)
河南省重大科技专项(131100110500)
关键词
高温干旱
遮阴
茶园
生态环境
光合有效辐射
hot dry
shading
tea plantation
eco-environment
photosynthetically active radiation
