堆肥の畝間表面施用が茶園の土壌環境および根系に及ぼす影響

日本作物学会紀事

名越 時秀¹  廣瀬 友二¹  川村 いづみ¹  玉井 富士雄¹  元田 義春¹  平野 繁¹  福山 正隆¹ 

[1] 東京農業大学農学部

关键词: Compost application;    堆肥表面施用;    Modified trench method;    改良トレンチ法;    Nitrate nitrogen;    硝酸態窒素;    Root system;    根系;    Soil hardness;    土壌硬度;    Tea plant;    チャ;   

DOI  :  10.1626/jcs.79.431

学科分类：农业科学（综合）

来源: Nihon Sakumotsu Gakkai / Crop Science Society of Japan

【 摘 要 】

Tea cultivation with intensive use of chemical fertilizers burdens the soil environment and might adversely affect tea plants. In this study compost was applied instead of chemical fertilizer in spring and autumn to reduce the application rate of chemical fertilizer (hereinafter, comp treatment) for five years. The results showed that the tea treated with comp differed little from that treated with chemical fertilizer mostly (chem-treatmen) in growth, nitrogen rates, or tannin rates of new shoots elongated. However, the comp-treated tea roots were more numerous than those of chem-treated tea and were distributed more deeply into the soil layer. The comp-treated soil was softer than the chem-treated soil in the surface to the deep soil layer: application and was more friable and well-drained. A soil solution of the chem-treated soil had a pH of less than 4.0 at 15-cm depth. In contrast, the comp-treated soil was pH 5.0–5.5, which is optimal for tea cultivation. The nitrate nitrogen concentration in a solution taken from the tea root zone at 100 cm soil depth in the comp-treated soil was lower than that from the chem-treated soil.

【 授权许可】

Unknown