土壌のアンモニウム固定に就いて : IIアンモニウム固定の仕方
スポンサーリンク
概要
- 論文の詳細を見る
A study is made on the manner of ammonium flxation by three soil samples which have the property of fixing large quantities of ammonium, as shown in table 4.The results obtained are summarized as follows : 1.Equilibrium between ammonium and potassium on soil is observed within two hours at about 30℃, when 50cc, of 10 per cent potassium chloride solution is applied to 5g.of soil. 2.The fixation of ammonium by soil is rapid, its process to appears to continue for 24 hours. 3.The fixation of ammonium by soil occure more slowly at 6℃ than at 30℃, but no difference is found between at 30℃ and at 70℃, The temperature has no effect on the replacement of ammonium by potassium soil of sample 431 or 436,but in case of 439 its replacement is still incomplets within 3 hours at 6℃. 4.When more than one normal potassium chloride soltuion is used as an extracting solution the amount of ammonium fixed by soil is not affected with the concentration of that solution.When hydrochloric acid solution is used as an extracting agent, the ammount of ammonium fixed by soil decreases with increase of its concentration ; but even when the acid solution is incresed to 3 normal solution, appreciable ammount of ammonium are not recovered. 5.The order of effectiveness of the extructing agents examined is rather irregular with soil samples used, but as a rule hydrochloric acid is the most effective, and potassium chloride is powerful among the chlorides. 6.If a soil is dried on the steam bath after ammonium chloride solution applied, the amount of ammonium fixed or adsorbed by soil is markedly increased.The increased amount of ammonium fixed is nearly equal to that adsorbed. 7.In case of soil sample 431 or 436,the fixation capacity is virtually satisfied when ammonium chloride is applied at the rate of 10 me.per 100g of soil, but it is not true in soil 439. 8.The monber of ammonium fixation by soil 431 is similar to that by soil 436,but it differe with that by soil 439.
- 社団法人日本土壌肥料学会の論文
- 1952-03-30