摘要
[研究目的]为使适应性强,营养丰富的绿萍在稻田系统中的生态优势得到充分体现,加强绿萍的循环应用,[方法]采用田间小区试验,动态分析了稻鸭萍共作系统的生态结构,绿萍在系统中的生长动态和增产效应。[结果]通过鸭子和绿萍在稻田生态位的添加,使原来的稻田食物链结构趋向复杂化,增加了稻田生态系统的稳定性,有效促进了水稻产量性状的表达和稻米品质的改善。稻鸭萍共作处理的有效穗、千粒重、实际产量分别比对照处理高出7.77%、1.34%和20.03%;整精米率提高4.02%,垩白粒率降低30.24%。随着鸭子的不断成长,对萍的采食量也不断增加,整个共作期间每只鸭可食鲜萍量40.8kg。鸭子在稻田的取食、践踏、嬉戏等行为,利于绿萍的分萍、倒萍,促其生长,绿萍生长后期倒萍速度明显低于稻萍处理。[结论]总之,稻鸭萍共作系统是一项种养相结合,节本增效的生态工程技术。
[Objective]To embody azolla ecology advantages and increase azolla utilization, [Method]we adopt experiment plots to study increasing yield and population dynamics of azolla in rice-duck-azolla integrated farming. [Results]The results showed that it improves rice yield and rice quality, because of food chain complexity and system stability in rice-duck-azolla integrated farming. Through rice quality items analyzing, available panicles, 1000-grains weight, practical yield and head rice ratio increased 7.77%, 1.34%, 20.03% and 4.02% in rice-duck-azolla integrated farming treatment compared to CK treatment, but chalkness decreased 30.04 %. Ducks＇ activity make for azolla growth, and decreasing speed of azolla is lower than rice-azolla treatment. The amount of ducks eating azolla is 40.8kg in total integrated period.[Conclusion]In a word, rice-duck-azolla integrated farming is a safe and high efficiently ecological approach.
出处
《中国农学通报》
CSCD
北大核心
2009年第6期206-209,共4页
Chinese Agricultural Science Bulletin
基金
江苏省农业科技项目(BC2005312)
国家科技攻关重大项目(2002BA516A14)
关键词
绿萍
消长动态
生态效应
水稻产量
水稻品质
azolla, population dynamic, ecology effect, rice yield, rice quality
