湿地松与茶树间作生态效应的研究

<正>本文对14～15年生湿地松与茶树间作茶园和单作茶园的研究表明:间作茶园光强减弱45.2～38.6％,气温低1～3 ℃,昼夜温差小,空气湿度夏季有明显提高;土壤养分含量,0～20cm土层内有降低趋势,20～60cm稍有提高;茶树叶片的净光合效率提高4％左右,蒸腾强度降低20.3～21.7％;叶片上表皮、栅状组织和全叶均较薄,叶质柔嫩,茶叶产量平均提高 8％左右;茶叶中的咖啡碱、氨基酸含量较高,酚、氨比值低,绿茶品质较好;林木蓄积量为3.3m~3/亩,综合经济效益可提高30％左右。

STUDIES OF ECOLOGICAL BENEFITS OF INTERPLANTING SLASH PINES IN TEA PLANTATION

By using the date collected from a 14-15 year-old tea plantation intercropped with slash pine, We have compared the main ecological factors, the physiological characteristics and the anatomical structure of tea leaves with those from the pule tea plantations, The results obtained show that the light intensity in the interplanted tea plantation is 45.2-38.6% lower than that in the pure one; the temperature is 1°-3°C lower during the day time and relativily higher during the night with a small daily fluctuationSj the relative humidity of air is higher in summer and the soil nutrient is less in the upper layer of 0-20cm and more in the lower layer of 20-60cm. Also in the intercropping system, the photosynthesis rate tea plants is 4% greater and their evapotranspiration rate is 20.3-21.3% less than that in the open. The upper epidermis, palisade tissues and leaves are all thinner, so the leaves are more tender, and its yield is 8% higher; there are more caffeine and amino acids in the leaves and the ratio of poly-phenol to amino acids is lower. All these indicate that the green tea from the pure tea plantations. The actual stock volume of interplanted trees reaches 49.5m3 per hectare. Therefore, the comprehensive economic benefits of the intercropped tea plantation is 30% greater than that of the monoculture of tea plants.