论文部分内容阅读
在日本的主要茶区,酸性土壤分布非常广泛。茶树是耐酸性很强的植物,在土壤的PH(H_2o)为5～5.5的条件中,或者土壤中可置换性盐基钙、钾、镁的饱和度依次为25%、1D%、5%,或者钙镁总饱和度为30～35%,钾的饱和度为10%的各种代换性盐基组成的条件中,茶树生长最适宜。然而,近年来,随着茶叶生产发展,施肥量显著增加,就以与茶叶品质关系深的氮素来讲,每10a(注:Ia=0.1448亩)施用量超过120公斤的事例也屡
In Japan’s main tea district, acidic soil is widely distributed. Tea tree is a plant with strong acid resistance. Under the condition of PH (H 2o) of 5 ~ 5.5 in soil or in the soil, the saturation of calcium, potassium and magnesium in replaceable base are 25%, 1D%, 5% , Or calcium and magnesium with a total saturation of 30 to 35%, potassium saturation of 10% of the substitution salt base composed of conditions, the most suitable for the growth of tea. However, in recent years, with the development of tea production and the significant increase in the amount of fertilizer applied, the application rate of more than 120 kg per 10a (Note: Ia = 0.1448 mu)