|Title:||各種氮肥連用試驗成績－1952～1957年||Other Titles:||An Experiment on the Effect of the Continuous Application of Ammonium Sulphate, Ammonium Chloride, Calcium Ammonium Nitrate and Urea to Rice||Authors:||林國謙
|Issue Date:||4-Jun-1960||Publisher:||農業試驗所||Journal Volume:||9||Journal Issue:||2||Start page/Pages:||32-45||Source:||農業研究||Abstract:||
An experiment on the effect of the continuous application of Ammonium Sulphate, Ammonium Chloride Calcium Ammonium Nitrate and Urea to rice has been carried out in four localities namely Taipei Hsinchu Taichung and Pingtung since 1952. The yield data of the first 6 years experiment were analyzed statistically and the soil samples of the high rate (120kg/ha N every crop) application plots of these fertilizers and the check plot collected at the fall of the 6th year were provided for chemical determinations including pH organic matter total nitrogen and exchangeable Ca & Mg.
The resuts may be summerized as follows:
1 As for the availability of these nitrogenous fertilizers there are no significant differences existed between Ammonium Sulphate and Ammonium Chloride, The effect of urea comes also very near to the above two and among these four kinds of fertilizers Calcium Ammonium Nitrate is the most inferior. The difference is more significant in the first crop than in the second crop. This is mostly the same as in the previous report.
2. As the period of experiment was still short, no significant effect of the continuous application of the same fertilizer on rice yield was observed.
3. The organic matter and total nitrogen content of all the fertilizer treatments do not differ definitly from one to another. However the pH value and the exchangeable Ca & Mg content of the soil applied with Ammonium Sulphate and Ammonium Chloride are found to be a little lower than the check, while that of the soil applied with Calucium Ammonium nitrate is a little higher. The trend was observed in Taipei & Taichung localities but not in others.
|Appears in Collections:||1.台灣農業研究(1950～迄今)|
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