论文部分内容阅读
据苏联《农业化学》1976年第2期报导,德聂伯罗彼特洛夫蔬菜瓜类作物试验站1971～1973年连续三年对西瓜施用化肥的最适用量进行了试验。试验田为普通中壤黑钙土,耕层腐植质含量3.6～4.2％;pH6.9;水解酸度0.84～1.4毫克当量,吸收性盐基总量26毫克当量/100克土;速效磷20.8毫克,速效钾31.2毫克/100克土。试验小区面积109.8平方米,重复4次。化肥用量分N45P45K45、N45P90K45、N90P90K90、N90P135K90、N90P135K135和N45P135K45等六个处理,以不施化肥的作对照。试验田前茬为苜蓿,化肥于秋耕
According to the Soviet Union, “Agrochemicals” No. 2, 1976 reported that Dnepropetrovtal vegetable melons crop stations 1971 to 1973 for three consecutive years of the most appropriate amount of fertilizer applied to watermelon were tested. The experimental field is ordinary middle-soil black-earth soil with the humus content of 3.6-4.2%; pH6.9; hydrolyzed acidity of 0.84-1.4 mg equivalent, total amount of absorbent salt base of 26 mg / 100 g soil; available phosphorus 20.8 mg, Available potassium 31.2 mg / 100 grams of soil. The test plot area of 109.8 square meters, repeated 4 times. Fertilizer dosage points N45P45K45, N45P90K45, N90P90K90, N90P135K90, N90P135K135 and N45P135K45 six treatments, with no fertilizer as a control. Experimental crop before the crop alfalfa, fertilizer in autumn farming