【摘要】 吉林省中西部有大片轻碱地,是我省重点开发水田地区。但由于地多人少、草荒严重,再加上早春缺水、碱害死苗,产量偏低,影响了水稻的发展。针对上述问题,自1979～1981年研究总结出:省工、省水、成本低的“轻碱地水稻旱种化学除草体系”。在生产上推广应用,已见成效。本文阐述了“轻碱地进行旱种的除草体系”,解决了碱害与药害、保苗与灭草两大矛盾。并提出了有效可行的措施。三年来已研究出水稻旱种,播前诱发杂草,结合耙地灭草;苗期(水稻立针10%,稗草1～2叶期)用50%杀草丹乳油混加20%敌稗乳油,按0.7斤/亩+1.0斤/亩或0.4斤/亩+0.7斤/亩的配方喷杀;分蘖期再用50%稗草烯乳油混加25%除草醚可湿粉,按0.07斤/亩+0.7斤/亩封闭。简称“耙、杀、封”除草体系。该体系经济有效,切实可行,已为近两年在千亩以上生产实践中所证实,灭革效果均在90%以上,对水稻安全。更多还原

【Abstract】 There are a larger areas of light alkaline land in the westcentral Jilin province,where the paddy field are developping.The factores effecting rice production development are more land and less man,weeds are seve-rity,short of water in spring,seedling died from alkaline,so that the rice yield lower.To resolve thes problemes,we carried out this study for three years(1979-1981)and summarized the chemical weed control system in rice sowing in dry land on light alkaline land.This system saved man power,water and costs,and has been adopted widely by production.This paper described the weed control system on light alkaline land where rice sowing in dry land and resolved exactly the corclation of al-kaline and chemical toxity,keep a full stand of seedling and weed con-trol and suggested the effective measure.In a 3-year experiment,when the rice sowing in dry land,combination of induced weeds with one discing weed control was applied beferc sow-ing,a mixture 50% of benthiocarb emulsion+20% propanil spraied at rate 0.7+1.0jin/mu or 0.4+0.7jin/mu at seedling stage,and a mixture of 50% TCE-styrene+25% Nitrofene was applied at rate 0.07+0.7jin/mu at tillering stage as asealing compound.This weed control system,so called“discing,killing and sealing weed control system”,is economi-cal effectiveness and practicality and has been demonstrated by produc-tion practice on more than one thousands mu rice fields in this two year.Its effectivity of weed control may be more than 90% and caused no in-jury to rice.更多还原