熟畑化過程における雑草植生の変遷に関する研究 : 第11報土壌酸度の変化による雑草の生態的防除について

概要

論文の詳細を見る
Changes of Weed emergence and their growth were studied by applying a series of calcium carbonate dosages at an immature upland field. The weed species studied were Zoysia japonica Steud., Arthraxon hispidus Makino, Houttuynia cordata Thunb., Cassia minosoides L., Rumex Acetocella L., and Achyranthes japonica Nakai. All of these species were planted at the first year and then after only annuals were sowed in early December of the consecutive three years. During the period of four years, there were little trends of the changes in soil physical properties such as the hardness and percent aggregate between weed vegetation, amount of the carbonate applied and the order of year. Excluding in the first year, the six species of weeds emerging decreased in fresh weight as the soil pH decreased and the year progressed. Some of the experimental plots with high calcium carbonate dosages showed no or little emergence of the weeds in the third or fourth year. Lethal soil pH (KC1) was estimated at 5.40 for Zoysia japonica Steud., 5.60 for Arthraxon hispidus Makino, 5. 65 for Houttuynia cordata Thunb., 5. 25 for Rumex acetocella L. and 5.67 for Achyranthes japonica Nakai. The pH values for the above respective weeds had been 4.72, 5.33, 5.08, 5.25 and 5.25 according to the previous investigations. Thus, the pH ranges observed both by the present and previous investigations appear to be theindexes for an ecological control of these weeds by a soil pH aletrnation. Though a soil acidity changes a little depending upon enviromental conditions, the determination of lethal soil pH range for weeds is beneficial to establish an ecological control measure for the particular weeds in the processes of field maturation.
日本雑草学会の論文
1981-11-25

著者

菅原清康
新潟大学農学部附属農場

熟畑化過程における雑草植生の変遷に関する研究 : 第11報土壌酸度の変化による雑草の生態的防除について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク

熟畑化過程における雑草植生の変遷に関する研究 : 第11報 土壌酸度の変化による雑草の生態的防除について

スポンサーリンク

概要

著者

関連論文

スポンサーリンク

熟畑化過程における雑草植生の変遷に関する研究 : 第11報土壌酸度の変化による雑草の生態的防除について