微量元素對水稻苗床之影響　第三報　錳對水稻收量之影響（水耕試驗）

Effects of Some Minor Elements on the Nursery Bed of Rice Plants (Ⅲ) The Effect of Manganese on the Yield of Paddy Rice (Water Culture Experiment)

徐水泉(S. C. Hsu) ； 邱再發(T. F. Chiu)

《中華農業研究》 7卷4期 (1957/12) Pp. 1-6

https://doi.org/10.29951/JARC.195712.0007

摘要

爲明瞭錳對水稻收量之影響進行水耕試驗。育苗時期使用500ml燒杯，移植後使用21玻璃筒爲水耕容器，每星期調換培養液二次。本試驗分爲兩部分。
(1)苗床施用錳對水稻收量之影響：錳處理之稻苗移植後不施用錳，其結果錳處理與對照無錳區之生育情形及收量大略相同，因此受錳影響之健全稻苗其後之生育中無繼績施用者其效果即消失。
(2)移植後施用錳對水稻收量之影響：依錳濃度不同影響水稻生育甚大。尤其適量之施用對公蘖及藁谷收量有良好影響。Mn 1~5 ppm時效果最佳，20ppm時收量減少，50ppm時毒害甚大。對照區（無錳）之藁收量爲100時，Mn 1~5 ppm爲124，Mn 20 ppm爲76， Mn 50 ppm爲34，對谷收量之指數，Mn 1~5 ppm爲116，Mn 20 ppm爲70，Mn 50 ppm爲19。
培養液錳濃度對水稻中錳含量有正相關而對水稻中氣、磷、鉀含量似乎無影響。此等要素含量在藁部比根部高。

並列摘要

In order to ascrtaining the effect of manganese on the yield of paddy rice, water culture experiment were carried out in the green house. 500 ml. beakers as germination beds and 2 litre glass cylinders as water culture vessels were used. Culture solution was changed twice a week. There were two sections in this experiment being concerned.
(1) The effect of manganese applied in the nursery on the yield of paddy rice; Manganese was only applied in the nursery but not after transplantation. The result showed little difference of the growth of rice plants between the check plot and the treated plot after transplantation. It indicated that manganese absorbed by rice seedlings did not influence the latter growth of rice unless manganese would be applied continuously after transplantation.
(2) The effect of manganese applied after transplantation on the yield of paddy rice; Manganese effect much on the grwoth of rice plant due to the concentratration of Mn in culture solution. Number of culm, yields of straw and grain in the optimum Mn plot was increased, and the difference between the treated plot and the check plot was significant. Taking the yields of straw and grain of the check plot as 100 respectively, that of the other treated plot was calculated as follow; (Mn 1-5 p.p.m.) 124, (Mn 20 p.p.m.) 76, (Mn 50 p.p.m.) 34 for indices of straw, and (Mn 1-5 p.p.m.) 116, (Mn 20 p.p.m.) 70, (Mn 50 p.p.m.) 19 for the indices of grain.
High correlation between Mn content in rice plant and Mn concentration in culture solution was obtained by chemical analysis. N, P2O, K2O contents in rice plant were not influenced by Mn treatment. The contents of these elements in straw was higher than that in root.