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利用化学药剂除草,是农业生产上推广的新技术。水稻化学除草剂共有十大类四十余种。其中用于水稻除草的有十七、八种。目前我省稻田采用的除草剂有二四滴、二甲四氯、除草醚、敌稗、五氯酚钠、扑草净、敌草隆等十多种。省五七干校地处黄河南岸,属于次生盐碱化的新稻区。据田间杂草大面积的普查,以三棱草为主,其密度为300—1000株/米~2。另外,芦苇草、稗草、竹叶漂、破铜钱、鸭嘴草等在稻田内有零星分布,其密度均在0.01—0.2株/米~2。三棱草是与水稻争光、争水、争肥的主要敌人。干校每年种水稻八百余亩,主要靠学员和办校职工劳动。每年水稻插秧和除
Weeding by chemical agents is a new technology promoted in agricultural production. Rice chemical herbicides a total of ten categories more than 40 species. Among them, there are 17 or 8 kinds of weeds used for rice. At present, there are two or four drops of the herbicides used in paddy fields in our province, such as dimethyl tetrachlor, weeding ether, propanil, sodium pentachlorophenol, prometryne and diuron. Provincial 57 cadre school is located in the south bank of the Yellow River, belonging to the secondary salinization of new rice area. According to the large area census of weeds in the field, the grass is mainly Sanjiaobian whose density is 300-1000 plants / m ~ 2. In addition, Phragmites australis, barnyardgrass, bamboo leaf drift, broken copper money, duckbill and other sporadic distribution in the rice fields, the density of 0.01-0.2 plants / m ~ 2. Triangular grass is competing with rice, water, fight fat main enemies. Dry school every year more than 800 acres of rice, mainly by students and school workers work. Annual rice transplanting and removal