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日本的土壤诊断标准,是按照土壤调查保全事业的生产力可能性分级标准,养分丰缺项目中的交换性钙、镁、钾的含量,不论土壤盐基交换量(CEC)的大小,均以每百克干土的毫克数表示,这往往不符合实际情况,特别不符合最近蔬菜栽培的多肥情况.为此进行了研究.试检采用CEC不同的三种土壤,即粗粒质花岗岩土壤(4.3 me)、洪积层土壤(10.3 me)、腐殖质火山灰土壤(42.2 me)装入塑料圆筒,埋入田间,盐基比例(me比)为钙:镁:钾=12:2:1,呈露地状态栽培胡罗卜、甘兰,盐基饱和度为70%、100%、130%三种处理.
Japan’s soil diagnostic criteria are based on the grading standard of productivity of the soil survey preservation business and the content of exchangeable calcium, magnesium and potassium in the nutrient deficit project regardless of the size of the soil base-exchange (CEC) The milligrams of dry grams of hake indicate that this often does not correspond to the actual situation and is particularly inconsistent with the more fertile case of recent vegetable cultivation.There are three different CEC soils that are tested for the coarse grained granitoid soil ( 4.3 me), alluvial soil (10.3 me) and humus volcanic ash soil (42.2 me) into a plastic cylinder buried in the field. The ratio of base to base is calcium: magnesium: potassium = 12: 2: The cultivated carrot and kalanchoe cultivated in the open field showed that the basal saturations were 70%, 100% and 130% respectively.