Beauv effectively, and bensulfuron methyl (30g/hm^2) applied 6 d after rice transplanting could significantly reduce the plant numbers and biomass accumulation of difformed galingale (Cyperus difformis L.) and procumbent falsepimperne . The control efficiency of Huakangcao 78 and Yangdao 6 were 89.16% and 81.86% on barnyardgrass dry weight respectively 50 d after the rice transplanting, 83.56% and 84.93% on difformed galingale dry weight, 95.22% and 88.04% on procumbent falsepimperne dry weight. As a whole, the total dry weight control efficiency were 87.68% and 82.69% on above weeds correspondingly. Moreover, the grain yield of Huakangcao 78 and Yangdao 6 under the condition of 10cm depth water and herbicide application increased 40.33% and 21.36% comparing those under the treatment of 5cm depth water and no herbicide application respectively.

結(jié)果表明亚洲三级片在线网站，水稻化感作用結(jié)合深水層可有效抑制稗草的萌發(fā)和生長(zhǎng)毛片在线看，同時(shí)水稻移栽后6d使用芐嘧磺隆(30g/hm^2)單劑處理免费直接可以看的黄色网站，明顯地抑制了異型莎草和陌上菜的萌發(fā)數(shù)量和生物量積累欧美aaaa黄片免费看；水稻移栽后50d男人的天堂视频网站，華抗草78和揚(yáng)稻6號(hào)對(duì)稗草的干重防效分別為89.16%和81.86%，對(duì)異型莎草的干重防效分別為83.56%和84.93%美女裸体被操网站免费，對(duì)陌上菜干重防效分別為95.22%和88.04%se色综合w，對(duì)這3種雜草的總干重防效分別為87.68%和82.69%无码操B在线播放；10cm深水層及施用芐嘧磺隆單劑條件下2個(gè)水稻品種的產(chǎn)量比5cm水層伊人网在线免费、不施化學(xué)除草劑的處理分別增產(chǎn)40.33%和21.36%欧洲一级电影免费播放视频。

Points out that wide-row and narrow-distance quantificational planting mode is the reason of high-yield in rice transplanting by machine.

指出機(jī)插稻的高產(chǎn)優(yōu)勢(shì)源于其寬行窄距的定量栽培模式。

It is conducive to uptake soil nitrogen for flue-tobacco on dryland soil with maize-tobacco rotation before topping (60 days after transplanting) and uptake soil nitrogen for flue-tobacco on paddy soil with rice-tobacco rotation after topping.2 The nitrogen utilization efficiency of rapeseed cake, rice straw and rape straw were 19.5%, 15.5%, 8.1% respectively, and the inorganic fertilizer nitrogen utilization efficiency were 41.1%, 42.7% and 35.7% under the combined application of organic additives and inorganic nitrogen fertilizer. The contribution rate of rapeseed cake, rice straw, rape straw to accumulated nitrogen of flue-cured tobacco were 1.0%, 2.4%, 2.7% respectively by the combined application of organic additives and nitrogen fertilizer. Flue-cured tobacco for organic nitrogen absorption meet with the nitrogen needs laws of high-quality tobacco, indicating that the combined application organic additives and inorganic nitrogen fertilizer reduces the nicotine content of tobacco, an increase of sugar/nicotine ratio and improved the quality of tobacco. In which the role of rice and rape straw is greater than the rapeseed cake can be used as measures to lower nicotine.3 Nitrogen accumulation in flue-cured tobacco with the total nitrogen input was a significant positive correlation during the growth stage of flue-cured tobacco. The total nitrogen input for the 156.3-405.5kg.hm-2, in which the soil nitrogen mineralization capacity account for 22.6%-54.3%, with an average of 34.5%, that is, soil nitrogen mineralization accounted for 1/3 of the total nitrogen input.

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