论文部分内容阅读
1980年在全国第二次土壤普查中,了解到南台镇土壤含钾量偏低,平均含速效钾76ppm;1983年为58.12ppm;1984年为52ppm。依据《肥料手册》(北京农业大学编1979年版)介绍,每生产百斤玉米需钾2.1斤,高粱需钾3斤,大豆需钾4斤。针对这几种作物需钾量,土壤的供钾能力是不充足的,同时考虑到进一步提高单位面积产量的需要,自1980年以来,在施用氮、磷肥料的基础上,我们又做了施用钾肥的多点试验。现将几年来的试验结果汇总如下。一、试验条件与方法1.试验田在本镇后五道村,1981年做玉米(丹玉11号)施用钾肥试验,小区面积33平方米,设三次重复。小区的农化性状:碱解
In the second national soil census in 1980, it was learned that the soil potassium content in Nantai Township was low, with an average of 76ppm of available potassium. In 1983 it was 58.12ppm. In 1984 it was 52ppm. According to the “Fertilizer Handbook” (Beijing Agricultural University, 1979 edition) introduction, each kilogram of corn required to produce 2.1 kilograms of potassium, sorghum need 3 pounds of potassium, soybeans need 4 pounds of potassium. In response to the need for potassium in these crops, the potassium supply capacity of the soil is not sufficient. In view of the need to further increase the yield per unit area, we have applied the nitrogen and phosphate fertilizers since 1980 Multi-point test of potash. Now the test results over the years summarized below. First, the test conditions and methods 1. Experimental field In this town after five villages, 1981 maize (Dan Yu 11) application of potassium fertilizer test area of 33 square meters, set three times. Community agrochemical properties: alkaline solution