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豫南稻区位于北亚热带向暖温带过渡地带,水利资源丰富,宜于稻田和各种水面养萍.过去由于国内红萍[Azolla imbricata(ROXb)Nakai]品种抗寒耐热性弱,豫南地区不能自然越冬,越夏也很困难,需要覆盖薄膜,泉水放养保种,不仅成本较大,而且手续繁琐,群众不易接受,使养萍工作的开展受到严重阻碍.为了寻求抗寒耐热品种,1978年以来,我们先后引进一批萍种,经试验研究和大面积示范推广证明,卡洲满江红抗寒抗热性强,在豫南地区可以自然越冬、越夏,是适宜该区放养的一个优良萍种.为解决肥料、饲料、饵料资源不足开辟了新途径.现将1981——1986年的试验研究资料综合整理成篇,以供参考.
The southern Henan rice area is located in the transitional zone from the north subtropical zone to the warm temperate zone, and is rich in water resources and suitable for paddy cultivation in various paddy fields. In the past, due to the weak cold and heat resistance of domestic Azolla imbricata (ROXb) Nakai varieties, The area can not overwinter naturally, the summer is also very difficult, need to cover the film, spring stocking and conservation, not only the cost is large, and the procedure is cumbersome, the masses are not easy to accept, so that the work of raising duckweed has been severely hindered.In order to seek cold and heat resistant varieties Since 1978, we have introduced a number of species, the experimental study and demonstration of large-scale demonstration and promotion, card Chau River red cold and heat resistance, natural wintering in southern Henan, summer, is suitable for stocking in the area A good species of Ping. To solve the problem of insufficient fertilizer, feed, feed resources has opened up a new way. Now 1981 - 1986 experimental research data into a comprehensive article for reference.