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作者研究了柑桔磷和钾的吸收量与土壤中这些元素含量的关系,以及施用氮素对吸收磷钾的影响。从本场“川野”夏橙氮素施用法试验园内,采集日本坪洪积土壤,装入素烧钵内,每钵栽植夏橙实生苗2株。氮、磷、钾各作二个水平处理,第一水平是每钵施相当于氮、磷、钾各2克的硫酸铵、磷酸氢钙和硫酸钾,在1981年5月和10月分两次施,每次各施1克。第二个水平是不施肥。试验时间是1980年7月至1982年1月。所得结果如下。
The authors studied the relationship between the uptake of phosphorus and potassium in citrus fruits and the content of these elements in the soil and the effect of nitrogen application on phosphorus and potassium uptake. From the field “Kawano” summer orange nitrogen application method test garden, collecting Ping Hong plot soil, into the burning pot, each pot planted summer orange seedlings 2. Nitrogen, phosphorus and potassium for each of the two levels of treatment, the first level is applied per bowl equivalent to 2 grams of nitrogen, phosphorus and potassium ammonium sulfate, dicalcium phosphate and potassium sulfate, in May 1981 and October divided into two Shi facilities, each Shi Shi grams. The second level is not fertilizing. Test time is from July 1980 to January 1982. The results obtained are as follows.