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当前位置: 首页 > 文章 > 八个绿萍种在农业上的利用研究 Ⅱ.八个绿萍种在稻田养殖与利用技术的研究 中国农业科学 1982,15 (2) 72-77
Position: Home > Articles > STUDIES ON THE UTILIZATION OF 8 AZOLLA SPECIES IN AGRICULTURE Ⅱ.An investigation on their cultivation in paddy field and utilization methods Scientia Agricultura Sinica 1982,15 (2) 72-77

八个绿萍种在农业上的利用研究 Ⅱ.八个绿萍种在稻田养殖与利用技术的研究

作  者：
利卓燊;祖守先;毛美飞;Thomas A.Lumpkin
单  位：
浙江省农业科学院土壤肥料研究所
摘  要：
这项研究,是对我们引自五大洲的8个绿萍种的12个品系,进行了全年的繁殖速度、固氮能力、营养成分以及抗逆性等农业利用性质的测定后(报告见1982年《中国农业科学》第1期),从中选取较耐寒、固氮能力较高、早春繁殖快的4个种的5个样品,在早稻田以3种利用方式进行试验;在连作晚稻田以5个萍种进行养殖利用试验。其目的是进一步考察这些萍种在稻田的生长量以及能提供多少氮肥源;3种利用方式在埋萍入土后的养分释放特点和供肥性质,以及对水稻的产量构成和增产效果等,为今后有关科研和生产应用提供新的萍种源及其利用方式作参考。
译  名：
STUDIES ON THE UTILIZATION OF 8 AZOLLA SPECIES IN AGRICULTURE Ⅱ.An investigation on their cultivation in paddy field and utilization methods
作  者：
Li Zhouxin, Zu Shouxian, Mao Meifei (Institute of Soil and Fertilizers, Zhejiang Academy of Agricultural Sciences, Hangzhou, Zhejiang Province) Thomas A. Lumpkin (Department of Agronomy and Soil Science, University of Hawaii, Hawaii, U. S. A.)
摘  要：
Five cold-resistant and 5 heat-resistant lines of Azolla were cultivated in paddy rice fields to investigate their effects on the yield increase of rice. Results showed that A. filiculoides and A. imbricata were suitable for cultivation in the early rice field, while A. microphlla and A. caroliniana were good for the ate rice field.Different methods of utilization had different effects on the propagation and N-fixation of Azolla and its nutrient supply to rice. When it was utilized as a basal dressing, the production and N-fixation capacity were higher than when utilized as a top dressing, providing nutrient supply to the rice for a longer period during the whole growing stage. When utilized as a top dressing, itcould only supply nutrients to the rice at the heading and milk ripe stages, but with a side-effect of inhibition to tillering so that late maturity may occur. When utilized as a basal-and-top dressing it would enhance the growth of rice panicles due to the higer production and N-fixation capacity of the fern. However, oversupply of N during the late growing stage of rice could also bring about some undesirable effects to the rice. The effects of different methods of utilization of Azolla as a green manure on the yield increase of rice were in the following order;basal-and-top dressing>basal dressing(8 jin/mu)>top dressing>control.

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