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在不同土壤气候条件下,茶园营养元素保证指数是一个值得探讨的问题。Γ.C.戈特吉阿什维里和 O.Γ.奥里阿李(1969年)第一次确定了茶园土壤中钾的保证指数,他们认为当代换钾在红壤茶园100克土中少于15毫克、灰化土壤低于10毫克时,钾的供应便得不到足够保障。O.Γ.奥里阿李(1959年)早就查明土壤钾的保证率很低时,植株叶片钾含量明显减少。查图里亚(1968年)查明了格鲁吉亚灰化土的易水解氮的保证指数为:低的—10—20毫克、中等—20—30毫克,高的一45毫克/100克土壤。
Under different soil and climatic conditions, the nutrition index of tea plantation is an issue worth exploring. Γ.C Gotthard Ashevili and O.Γ. Oliver Lee (1969) for the first time established a guarantee index for potassium in the tea plantations soils that they believe contemporary potassium exchange is less in the 100g of red soil tea plantations At 15 mg, as little as 10 milligrams of ashed soil, the supply of potassium is not adequately protected. O.Γ. Oriah Lee (1959) has long been to identify the low rate of soil potassium guarantee, the plant leaf potassium content decreased significantly. Chacharia (1968) identified the guaranteed index of susceptible hydrolysable nitrogen in the ashes of Georgia as follows: low - 10-20 milligrams, medium - 20-30 milligrams and high - 45 milligrams / 100 grams of soils.