微量元素對水稻苗床之影響　第二報　單用微量元素對稻苗生育之效果（水耕試驗）

Effects of Some Minor Elements on the Nursery Bed of Rice Plants (Ⅱ) Effects of Minor Elements on Rice Seedlings (Water Culture Experiment)

徐水泉(S.C. Hsu) ； 邱再發(T.F. Chiu)

《中華農業研究》 7卷3期 (1957/12) Pp. 1-6

https://doi.org/10.29951/JARC.195712.0001

摘要

爲明瞭她用微量元素對稻苗生育之影響，於玻璃室舉行苗床水耕試驗。使用燒杯爲水耕容器，上面蓋紗布裝滿培養液然後播種。
依適量之錳處理，稻苗生育良好比對照區（無錳）確實可得健全之稻苗。錳之適當濃度爲Mn 2 ppm，而超過20 ppm就呈現毒害，1,000 ppm則致枯死。於Mn 20 ppm，稻葉開始向中葉脈捲縮生長受阻害，此毒害現象在50 ppm以上時更厲害。錳濃度至200 ppm，稻種發芽率無受影響，而超過500 pp m就降低。
化學分耕結果，隨培養液錳濃度增加稻苗中錳濃度也增加有正相關，則葉部錳含量爲trace~2.13%根部爲tlrace~0.92%。受錳處理之稻苗氮含量增加而鉀含量也稍有增加之傾向，磷含量者無此傾向。
對硼、銅、鋅、鉬、鈷另進行簡單試驗，其適量之施用對稻苗生育影響良好。據稻苗中三要素分析之結果，銅及鉬高濃度處理區之磷含量及硼高濃度處理區之鉀含量均有減低。

並列摘要

Water culture experiments were carried out for the purpose of ascertaining the effect of minor elements on the growth of rice seedlings. Beakers were used as water culture vessels. After laid the gauze on beakers for the germination beds, rice seeds were planted on them.
Rice seedlings in the treated plot, which the proper amounts of manganese were applied, grew better than the check plot. The optimum Mn concentration in culture solution for rice seedlings was 2 ppm. The treatment of Mn 20 ppm retard the growth of the plants and at Mn 1000 ppm all the seedlings were killed. It would be seen that even at Mn 20 ppm treatment the leaves rolled in towards the mid-rib and decreased the growth. This toxic symptom and decrease were particularly marked when the concentration of Mn rised from 20 to 50 ppm. The germination percentage of rice seeds was affected at the level of Mn 500 ppm but not at below 200 ppm.
Chemical analysis for N, P2O5, K2O and Mn showed that Mn contents in seedlings were increased in proportion to the concentration of Mn in culture solution. The result obtained was Mn trace-2.13% in leaves and Mn trace-0.92% in roots. The Mn treatment greatly increased the uptake of nitrogen and slightly increased potassium but not phosphorous.
The simple trials for B, Cu, Zn, Mo, Co on rice seedlings were also conducted. Better growth of the seedlings were obtained at the optimum treatments of these minor elements. The treatment of higher concentration of copper and molybdenum seemed to depress the uptake of phosphorous, so did boron to the uptake of potassium.