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当前位置: 首页 > 文章 > 早稻套萍对消纳稻田氮磷和增加水稻产量的影响 湖南农业科学 2010 (1) 16-18
Position: Home > Articles > Effects of Azolla spp. Culture with Early Rice on Absorptions of Nitrogen and Phosphor in Paddy Field and Increase of Rice Yield Hunan Agricultural Sciences 2010 (1) 16-18

早稻套萍对消纳稻田氮磷和增加水稻产量的影响

作  者：
石丽红;纪雄辉;李洪顺
单  位：
湖南省土壤肥料研究所
关键词：
红萍;稻田套萍;稻田表面水;产量;土壤肥力
摘  要：
田间试验研究了早稻套萍对降低稻田表面水养分浓度、增加水稻产量和土壤肥力的影响。结果表明:稻田套萍能够有效降低表面水总氮、总磷的浓度,7d内总氮去除率为30.0%,总磷去除率为56.8%;同时,水稻的成穗率、穗实粒数和结实率得到提高,产量也大有增加。根据监测期间红萍的平均氮磷含量、日增长速度以及稻田基肥施用后表面水总氮和总磷浓度计算,套种红萍约需46d和12d可完全消纳表面水中的氮和磷;稻田套萍前期可通过吸收表面水中的氮磷而降低稻田土壤表层有效氮磷养分,后期倒萍则能迅速为水稻提供养分,有利于水稻后期的生长发育和减少稻田氮磷流失。
译  名：
Effects of Azolla spp. Culture with Early Rice on Absorptions of Nitrogen and Phosphor in Paddy Field and Increase of Rice Yield
作  者：
SHI Li-hong1,2,JI Xiong-hui1,2,LI Hong-shun1 (1.Hunan Institute of Soil and Fertilizer,Changsha 410125,PRC;2.Hunan Agricultural Environment Research Center,Changsha 410125,PRC)
关键词：
Azolla spp.;Azolla spp.culture in paddy field;surface water in paddy field;yield;soil fertility
摘  要：
The effects of Azolla spp.culture with early rice on decreasing of nutrient concentration of surface water in paddy field,increasing rice yield and soil fertility were studied by field experiments.The results showed that Azolla spp.culture in paddy field could effectively decrease the concentrations of total nitrogen and total phosphor in surface water,the removal efficiencies of total nitrogen and total phosphor within one week were 30.0% and 56.8%,respectively;the productive tiller rate,grain number per panicle and seed setting rate of rice increased and the rice yield increased greatly.According to the average content of nitrogen and phosphor,diurnal growth rate of Azolla spp.and the concentration of total nitrogen and total phosphor in surface water that after applied base fertilizer to paddy field,the Azolla spp.need about 46 days and 12days to completely absorb the nitrogen and phosphor in water,respectively;at the early stage,the Azolla spp.will absorb the nitrogen and phosphor in surface water to reduce the contents of effective nitrogen and phosphor in paddy field surface,and at the late stage,the Azolla spp.could quickly provide the nutrition for rice to benefit the growth of rice and reduce the loss of nitrogen and phosphor in paddy field.

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