石灰 및 苦土가 土壤內 有效成分變化와 水稻生育에 미치는 影響 = The Effect on the Change of Available Elements in Soil and Rice Growth by Application of Calcium and Magnessium

국문 초록 (Abstract)

pH 5.5의 耕作土壤에 石灰를 1-6me/100gr까지 增加시켜 土壤內 成分과 水稻生育에 對하여 몇 가지 結果를 얻었으며, 역시 同一土壤에 Mg를 1-4me/100gr 施用하여 몇 가지 結果를 얻었다.
(1) Ca當量別 增加에 따라 exch-Ca와 pH의 變化는 比例的으로 增加되어 高度의 相關이 있다.
(2) 有效燐酸, 可溶性SiO2, 有機物, 活性鐵, 置換性 苦土等의 含量變化는 認定되지 않았다.
(3) 燐酸의 吸收係數는 Ca施用에 따라 正 相關이 認定된다.
(4) Ca施用에 따라 生育面에 莖數, 穗數는 減少되어 負相關이 認定된다.
(5) 草長, 稈長, 稔實率, 穗當着粒數에는 變化가 認定되지 않는다.
(6) Mg를 1-4me/100gr 增加施用에 따라 土壤內 exch-Mg와 有效燐酸은 增加되었다.
(7) pH 및 基他成分은 變化가 나타나지 않았다.
(8) Mg施用에 따라 生育은 草長, 莖數는 增加가 없었고 穗數와 稈長이 增加된 傾向이고 基他는 變化가 없다.

다국어 초록 (Multilingual Abstract)

Some results of rice growth and available element in soil were obtained by application 1-6me/100gr of calcium and 1-4me/100gr of magnessium in a soil which was pH 5.5.
The results of the study showed the followings.
1. Increasing the application of calcium, exch-Ca, pH and absorption coefficient of phosphorus were increased proportionally, but available ??, soluble SiO₂, O.M., active Fe and exch-Mg were not changed.
2. Number of Penicles and tillers were decreased proportionally but plant height, the length of culm, rate of grain formation and number of grain per penicle were not changed.
3. Increasing the application of magnessium, exch-Mg and available ?? were increased but the others were not changed.
4. Plant height and number of penicles were not increased but the number of tillers and the length of culm had tendency to increase.