摘要
详细叙述了细绿萍(Azolla filiculoides Lamk)从1979年4月引入黑龙江省以后至2009年的引种试验和生产试验推广全过程,特别对近10年间进行的春季扩繁速度和繁殖系数的品种比较以及水深度和施肥量对产草量影响等内容进行了细致研究。结果表明,细绿萍具有较强的耐低温能力,其最适宜生长繁殖温度为20℃左右;在相同条件下,细绿萍在单位面积的平均总产量和繁殖系数极显著高于绿萍;施磷肥可以显著提高细绿萍的产草量,适宜的施肥量为0.42kg·m-2;萍池水深度对细绿萍的生长速度有直接影响,在北方春季和初夏,较浅的水深度(10cm)更有力于细绿萍的生长和繁殖。
The introduction of testing and promotion of the entire process of production test about the Azolla （Azolla filiculoides Lamk） introduced from April 1979 to 2009 in Heilongjiang Province was fully described.Especially in recent 10 years,the propagation speed in spring and propagation coefficient of variety comparatively as well as that the water depth and fertilizer effects on yield was thorough studied.The preliminary results were as follows：the azolla had strong cold tolerance,whose most proper growth temperature was about 20 ℃.Under the same condition,the average output per unit area and the propagation coefficient of the azolla,compared with the green duckweed,concentrated separately.P fertilizer could significantly improve the azolla produce in quantity,appropriate fertilizer to 0.42 kg·m-2.Water depth had a direct impact on the growth rate of small azolla.In the northern spring and early summer,shallow water depth （10 cm） was more effective in small azolla growth and reproduction.
出处
《东北农业大学学报》
CAS
CSCD
北大核心
2011年第3期81-85,共5页
Journal of Northeast Agricultural University
基金
国家公益性行业(农业)科研专项经费(nyhyzx07-022)
黑龙江省科技计划(GA09B109-1)
关键词
细绿萍
引种
产草量
繁殖系
azolla
introduction
yield
propagation coefficient
