熟畑化過程における雑草植生の変遷に関する研究 : 1. 雑草草種の適応酸度について

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This present study was undertaken to clarify the adapted pH and the sphere of adaptation of soil reaction with the weeds growing in the field, new cultivated field, unriped field and riped field, respectively. The investigation was separated to measure with the soil pH as related to the scale of mass at the place formed a single mass of cach weeds. 1. As a result, when the variety of weeds examined was the same, no remarkable difference was found within. the adapted soil pH and the range of adaptation of soil reaction due to the scale of the single mass of weeds. 2. But, among the individual variety of weeds, it was recognized markedly differences with the adapted soil pH and the range of adaptation of soil reaction. 3. The weeds having a narrow range 0L adapted pH centering on the low pH value of soil reaction grown in the field, while that for the high pH of soil reaction was found in the riped field. And also the weeds grown in the unriped field showed a broad range of adaptation for the soil reaction. 4. It seemed that the convertion of the variety of weeds was brought, resulting in the occurence of appearance or disappearance of the variety of weeds owing to the adapted pH and the sphere of adaptation of soil reaction. 5. For the purpose of investigation it is possible to calucalated the average number of weeds per a scare due to the ordinal number of 1-5 classified into five grade from the digree of adapted soil pH. Furthermore, throughout the measurement of soil reaction of the respective place, it may be represented the characteristic of soil using the mass of weeds instead of soil reaction.
日本雑草学会の論文
1973-09-30

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 : 1. 雑草草種の適応酸度について

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