【摘 要】
:
To achieve the purpose of reducing farm non-point source pollution,we integrated site specific nitrogen management,precise irrigation,controlled drainage,and we
【机 构】
:
Hydraulic and Electricity Survey and Designing Institute of Heilongjiang,Harbin 150080,China“,”Rice
论文部分内容阅读
To achieve the purpose of reducing farm non-point source pollution,we integrated site specific nitrogen management,precise irrigation,controlled drainage,and wetland eco-repair system in dike area of Taihu basin.During investigation,it had given prominence for the water and fertilizer coupling effects of precise irrigation and site specific nutrient management,the characteristics of integration on controlled irrigation,controlled drainage and wetland ecosystem non-point source pollution control.Then the water and fertilizer integrated management mode of paddy field was put forward in Taihu basin where the water production efficiency increased to 1.64 kg·m-3,water saved 37.8%,fertilizer use efficiency raised 15.4%,yield raised 10%,and N,P load decreased 26%-72%.The mod agricultural and farmland ecosystems that control and cut down the farm non-point source pollution came into being,which can be a reference by Taihu basin to control its agricultural non-point source pollution and eutrophicated water body.
其他文献
The suitability of models for describing the clonal growth of Trifolium repens population was discussed.The results showed that deterministic models were inadeq
运用科学生产经营手段,提高对油茶特色产业综合开发程度,使油茶产业建设成为玉山县推进农业产业化和促进林农致富的一个新兴支柱产业。
The use of scientific production a
从选育方法、资源调查、选择育种以及良种选育等方面探讨了油茶良种选育技术。该课题的研究将为油茶良种选育提供技术支持,同时防止了因非良种种苗造林而形成新的低产林,确保
The transpiration experiment was done under greenhouse conditions with a C3 plant sweet pepper(Capsicum annuum Linn.)and two C4 plants,sorghum(Sorghum bicolor L
Bone morphogenetic protein-2(BMP-2)plays a key role in bone formation and maintenance.BMP-2 can stimulate longitudinal bone growth by increasing the growth plat
在社会主义市场经济条件下,企业的市场竞争已从单纯的质量进度竞争发展到综合运用品牌、价格、质量、速度的全方位竞争,因此,在企业全面参与市场竞争的时候,不能再把降低成本
The capsid protein precursor(P1),which plays a major role for the generation of polypeptides of swine vesicular disease virus(SVDV),was cloned from SVDV HK/70 s
北京市在种子管理工作上取得了很好的成绩,促进了种子市场的有序经营,保护了农民的合法利益.但是当前种子管理过程中还存在着一些问题,本文理论联系实际,结合自己的工作实际,