数種除草剤が水稲に及ぼす形態的影響とジメピペレートの薬害軽減効果 : 第2報異なる土壌あるいは処理薬量条件におけるベンスルフロンメチルとそのジメピペレート混合剤の形態的影響の変動

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Morphological effects of bensulfuronmethyl application to rice plant and their safening effect by its dimepiperate mixture application were investigated under various paddy soils and dosages of herbicides. 1) Experiments were carried out by using three kinds of soil ; clay loam (paddy soil of Chugoku National Agricultural Experiment Station), mixture of sand and clay loam (1 : 1) and sandy loam (paddy soil of Kagawa Prefectural Agricutural Experiment Station) . The growth inhibition of rice in shoots by bensulfurnomethyl application was severer by planting on the mixture of sand and clay loam and sandy loam which had lower CEC and clay content, than by planting on clay loam, and the recovery from growth inhibition on sandy loam tended to be later than on clay loam and the mixture of sand and clay loam . Effects of bensulfuronmethyl application on roots of rice were observed as the inhibition of root elongation and the decrease of root number at shoot units which emerged just after the herbicide application, and the degree of the influence appeared the severer in the order of the mixture of sand and clay loam > sandy loam > clay loam. 2) Herbicides were applied to rice plants grown on the clay loam plots at two dosages, 300 and 600g/a as commercial products. Severe growth inhibition of shoots and roots was observed in the case of applications at 600g/a. At severely affected shoot units, the root elongation was markedly inhibited, and the number of crown roots also decreased. 3) Safening effect in rice of the combined application of bensulfuronmethyl and dimepiperate was confirmed in experiments involving three kinds of paddy soils and two dosages of herbicides. 4) Injury to rice was found to appear in organs of successive shoot units, growing simultaneously.
日本雑草学会の論文
1989-05-30

数種除草剤が水稲に及ぼす形態的影響とジメピペレートの薬害軽減効果 : 第2報異なる土壌あるいは処理薬量条件におけるベンスルフロンメチルとそのジメピペレート混合剤の形態的影響の変動

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数種除草剤が水稲に及ぼす形態的影響とジメピペレートの薬害軽減効果 : 第2報 異なる土壌あるいは処理薬量条件におけるベンスルフロンメチルとそのジメピペレート混合剤の形態的影響の変動

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数種除草剤が水稲に及ぼす形態的影響とジメピペレートの薬害軽減効果 : 第2報異なる土壌あるいは処理薬量条件におけるベンスルフロンメチルとそのジメピペレート混合剤の形態的影響の変動