琉球石灰岩風化土壌の圃場条件における各種有機物の分解速度と土壌有機物の集積予測

DOI 日本農学文献記事索引 Web Site 被引用文献4件 参考文献18件
  • 後藤 忍
    鹿児島県農業試験場徳之島支場
  • 江口 洋
    鹿児島県農業試験場徳之島支場:(現) 鹿児島県農業試験場

書誌事項

タイトル別名
  • Decomposition Kinetics of Organic Materials under Field Conditions in Dark Red Soil Derived from Ryukyu Lime Stone
  • リュウキュウ セッカイガン フウカ ドジョウ ノ ホジョウ ジョウケン ニ オ

この論文をさがす

抄録

The decomposition of organic materials in Dark Red Soil under field conditions was measured using a glass-fiber filterpaper method. The samples examined were seven green menure (sorghum, pigeon pea, sesbania, guinca grass, pampas grass, clotararia, oats) and four composts prepared from bagas, poultry manure, cattle feces and sugarcane leaves. The order in the total carbon decomposition rate of organic materials after 3 y was green manure > poultry manure ≒ bagas > manure made from sugarcane leaves ≒ cattle feces. Three mathematical models were examined to compare the fitness of the decomposition values, and the following double-compartment first-order kinetics model was the best among the models : D_t = C_1e^<-k1t> + C_2e^<-k2t> (C_1 +C_2 =100%), where D_t is the amount of residual carbon of organic materials at time t (month) and C_1 (labile fraction) and C_2 (non-labile fraction) are the initial proportions decomposed according to the rate constants k_1 and k_2, respectively. The C_1 value was positively correlated with the total carbon of the organic material, the amount of ethanol-benzene soluble fraction and the amount fo hot water plus ethaanol-benzene solible fraction. The C_2 value was positively correlated with the amount of lignin. Using the decomposition rate obtained by this model, the long-term changes in total carbon in the soil by successive application of organic material was estimated. According to the estimation, it will take about 20 y to leach a stationary state.

収録刊行物

被引用文献 (4)*注記

もっと見る

参考文献 (18)*注記

もっと見る

キーワード

詳細情報 詳細情報について

問題の指摘

ページトップへ