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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。
There is a large area of light alkali in the central and western Jilin Province, which is the key area for rice paddy development in our province. However, due to the small number of people, a serious shortage of grass, coupled with early spring water shortage, alkali killed, the yield is low, affecting the development of rice. In response to the above problems, from 1979 to 1981, the study summed up: saving labor, water conservation, low cost “light alkaline land dry chemical weeding system.” In the promotion of production, have seen results. This article elaborated “weeding system for dry cultivation on light alkali soil”, which solved the two contradictions of alkali damage and injury, seedling protection and extinguishing of grass. And put forward the effective measures. In the past three years, dry cultivation of rice has been studied, weeds have been induced before sowing, and weeds have been harvested in combination with raking; seedlings (10% of rice needles and 1 to 2 leaves of barnyardgrass) are mixed with 50% Barnyard EC, according to 0.7 kg / mu +1.0 kg / mu or 0.4 kg / mu +0.7 kg / mu formula spray; tillering then reed 50% EC EC plus 25% of weeding ether wet powder, press 0.07 Kg / mu +0.7 kg / mu closed. Referred to as “rake, kill, seal” weeding system. The system is cost-effective, practical and feasible. It has been confirmed in more than two mu production practice in the recent two years that the effect of extinction is over 90%, which is to rice safety.