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当前位置: 首页 > 文章 > 绿萍对太湖地区稻田氮磷及水绵生长的影响 土壤 2010,42 (3) 398-403
Position: Home > Articles > Effects of Azolla on Nitrogen,Phosphorous and Growth of Spirogyra sp. in Flooded Paddy Field in Taihu Aera Soils 2010,42 (3) 398-403

绿萍对太湖地区稻田氮磷及水绵生长的影响

作  者：
蒋云芳;田玉华;尹斌
单  位：
土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所)
关键词：
绿萍;水绵;叶绿素;磷;氮
摘  要：
利用田间小区试验,研究了放养绿萍后对稻田水绵生长及田面水中N和P浓度变化的影响。在相同施肥水平下,绿萍处理的田面水中全N与NH4+-N浓度均低于无绿萍的处理。在分蘖期绿萍可调节土水中P的吸收与释放,减少了P肥损失的风险。此外,研究还发现施肥后的一段时间内,绿萍处理的田面水中叶绿素浓度变化较小,在20~45mg/m3之间,而不施绿萍处理的田面水中叶绿素浓度逐渐增加,3~5天后浓度就远远大于绿萍处理,达到了85mg/m3,说明绿萍生长可有效抑制藻类的爆发。
译  名：
Effects of Azolla on Nitrogen,Phosphorous and Growth of Spirogyra sp. in Flooded Paddy Field in Taihu Aera
作  者：
JIANG Yun-fang1,2,TIAN Yu-hua1,YIN Bin1(1 State Key Laboratory of Soil and Sustainable Agriculture(Institute of Soil Science,Chinese Academy of Sciences),Nanjing 210008,China;2 Graduate University of Chinese Academy of Sciences,Beijing 100049,China)
关键词：
Azolla,Spirogyra,Chlorophyll-a,Phosphorus,Nitrogen
摘  要：
In this paper the effects of Azolla inoculation on the growth of Spirogyra sp.and the variation in concentrations of nitrogen and phosphorus in flood-water in paddy field were studied by a field experiment.Under the same level of fertilization,the concentrations of total nitrogen and ammonium nitrogen in flood-water with Azolla application were less than those without Azolla application.During the tillering stage,the assimilation and release of phosphorous in soil-water could be modulated with Azolla application,which reduced the risk of phosphorous loss.In addition,chlorophyll content in flood-water with Azolla application changed little,ranging from 20 mg/m3 to 45 mg/m3,in contrast,chlorophyll content without Azolla application increased gradually and was much higher than with Azolla application after 3 to 5 days,up to 85 mg/m3,indicating that the development of Azolla could inhibit algal bloom.

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