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1980年按西南区绿肥科研协作规划,安排了细绿萍与本地萍繁殖速度对比观察,其目的在于了解细绿萍在昆明繁殖生长情况及问题,并与本地萍进行比较,探索其合理养用方式,为大面积推广提供依据.本试验在四月初开始放水并作小区田埂,划一平方米面积为一个小区,设计分:(1)细绿萍;(2)本地萍.三次重复,共计六个小区,小区附近分别划两片放养细绿萍及本地萍.放萍重按每亩1000斤计,折合每小区放养750克,每半月左右称萍一次.放萍前每区施普钙75克(相当于施普钙100斤/亩),硫酸钾 3.7克(相当于硫酸钾5斤/亩),施后略为搅动,随即放萍. 本试验从4月19日开始,雨季曾被大雨冲走两次,实际测产是从6月＊日开始放萍,连续不断,截至1981年6月11日止,共算26次,现将每次调查结果整理如下(图1)
In 1980, according to the collaborative planning of green manure research in Southwest China, the comparison of reproduction rate of fine green pingpung and local duckweed was conducted. The purpose of this study was to understand the reproductive growth and problems of fineleaf duckweed in Kunming and to compare with local duckweed to explore its reasonable raising Way to provide a basis for large-scale promotion .This test began in early April to release water and make plots, plot area of one square meter for a plot, design points: (1) fine green Ping; (2) local Ping. Repeat three, a total of six A small plot, plots were planted two small stocking green Luping and local Ping.Playing weight per 1000 acres of calculus, equivalent to each district stocking 750 grams, about once every half month Ping. (Equivalent to 100 kg / acre), potassium sulfate 3.7 g (equivalent to potassium sulphate 5 kg / acre), slightly agitated after application, then put Ping.This test began on April 19, the rainy season had been heavy rain Washed away twice, the actual production test is released from the June * day, continuous, as of June 11, 1981, a total of 26 times, the results of each survey are now organized as follows (Figure 1)