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在我国南方,红萍大面积越夏是养萍技术上一个难题,直至现在,还缺少成功的经验。我省自从引进耐寒性较强的细绿萍后,改变了过去养殖地方萍种的冬保为冬繁局面,对提高冬春季的产萍量和发展冬养春用,起了积极的作用。然而,细绿萍的抗热性差,且易受霉腐病、蚜虫等病虫为害,夏季,不易养殖成功,而自然死亡。细绿萍的越夏保种成为重点解决的技术环节。三年多来,我们通过试验,摸索出池框法、湿养等几种越夏技术;可是,只适合小面积应用,夏季田间大面积养殖仍缺乏省工省本的过硬办法。夏季红萍易死亡的原因是多方面的,不仅是一个高温因素影响;强光、高湿、
In the south of our country, the large area of Hongping summer summer is a technology problem of ping-ping, until now, still lack of successful experience. Since the introduction of fine cold greenpeace in our province, it changed the situation that the winter insurance for the past years was changed to the winter, which played an active role in raising the production level in winter and spring and developing the winter rearing. However, the fine green duckweed heat resistance, and susceptible to mildew, aphids and other pests damage, summer, not easy to breed, and natural death. Fine Green Lupu Xiaoshan seed to become the key to solve the technical aspects. In the past three years or so, we experimented to find out more summer techniques such as the tank-frame method and the wet-farming method. However, only suitable for small-area applications, large-scale cultivation in the field in summer still lacks an excellent way to save labor and capital. Summer red ducklings easy to death for many reasons, not only is a high temperature factors; glare, high humidity,