A pot experiment in greenhouse was carried out to study seasonal variations of CH 4 fluxes from rice paddy soils and the effect of land management in winter crop season on the seasonal variations.

通過溫室盆栽試驗對水稻土CH4 排放的季節(jié)變化及冬作季節(jié)土地管理的影響進行了研究能看黄的网站在线一区。

In the fangshan nursery of zhonglin company, Beijing ,on the basis of poplar tree vessel seedling 's weeding experiment with 11 weed killers in the greenhouse , the effects of 12 weed killers on seven broad-leaf tree seedlings were separately carried on by the way of soil treatment and leaf treatmen in the field . The research results indicated that 24% oxyfluorfen EC treated soil surface with quantity of 40-80ml each 667m2,the weeding effect can reache above 95%; 10% imazaquin AS with quantity of 15-25 ml each 667m2, and 30% benazolin-ethyl EC with quantity of 56-76 ml each 667 m2 were sprayed on the weeds or leaves of the seedlings, the weeding effects can reach above 81% and 85% respectively, but safe to nursery stock growth .

在北京中林公司房山苗圃基地，用11種除草劑配方在塑料大棚楊樹容器苗試驗的基礎上一级a看片免费视频，對大田七個闊葉樹種苗圃用12種除草劑配方分別進行土壤處理和莖葉處理顶级XXXX性欧美中年熟妇，結果表明，用24%惠爾乳油欧美网站专区，每667m2用商品量40-80ml作土壤處理jizzjizz35，除草效果達95%以上；用10%咪唑喹啉酸水劑和30%草除靈乳油每667m2用商品量分別為15-25ml和56-76ml作莖葉處理性感美女黄污被操黄污网站在线观看，除草效果分別達81%和85%以上变态调教一区二区三区女同，對苗木生長安全。