몇가지 사료작물(飼料作物)의 내염성에(耐鹽性) 관(關)한 연구(硏究)

Study on the Salt Tolerance of the Several Forage Crops

본(本) 실험(實驗)은 몇가지 사료작물종자(飼料作物種子)의 내염발아성(耐鹽發芽性)과 아울러 발아한계염분농도(發芽限界鹽分濃度) 및 내염성(耐鹽性) 사료작물(飼料作物)을 탐색(探索)코져 수행(수行)되었던 바 그 결과(結果)를 요약(要約)하면 다음과 같다. 1. 발아율(發芽率)은 염농도(鹽濃度) 0.4% 까지는 대조구(對照區)에 비(比)해 약간(若干)의 감소(減少)를 보였으나 0.8%에서는 급격(急激)한 감소(減少)를 보였다. 2. 발아소요일수(發芽所要日數)는 염분농도(鹽分濃度)의 증가(增加)에 따라 완만(緩晩)한 증가(增加)를 나타냈다. 3. 유묘장(幼苗長) 및 근장(根長)은 0.4% 염농도하(鹽濃度下)에서는 대비구(對比區)에 비해 약간(若干) 감소(減少)되었으나 0.8%에서는 급격(急激)한 감소(減少)를 보였고 1.2%에서는 발아후(發芽後) 곧 생육(生育)이 정지(停止)되었다. 4. 식물체내(植物體內)의 NaCl함량(含量)은 내염성(耐鹽性)과 밀접(密接)한 관계(關係)를 나타냈던 바 염분농도(鹽分濃度)의 증가(增加)에 따라 식물체내(植物體內) NaCl함량(含量)도 높아졌으나 그 정도(程度)는 작물(作物)에 따라 달랐다. 5. 사료작물(飼料作物)의 발아한계염농도(發芽限界鹽濃度)는 0.4% 내지 0.8% 범권(範圈)이었으며 내염발아성(耐鹽發芽性)이 가장 강(强)한 작물(作物)은 perennial ryegrass였고 tall fescue, creeping red fescue, orchardgrass의 순(順)으로 나타났다.

This study was carried out to investigate the salt tolerance to the seed germination of 4 forage crops and their critical salt concentration. 1. The rate of seed germinations of 4 forage crops at 0.4% NaCl solution was not significantly decreased compared with control plot but the germination percentages at 0.8% NaCl solution were significantly dropped. 2. The days for germination were gradually delayed by increasing salt concentrations. 3. The growth of seedling root and shoot was slightly depressed at 0.4% salt solution but significantly depressed at 0.8% solution. At 1.2% salt solution, the seedling growth was stopped immediatly after seed germination. 4. The NaCl content in the seedling was increased at the medium containing higher amount of NaCl, however increasing rate of NaCl level in the seedling showed significant differences among the forage crops tested in this experiment. 5. The critical salt concentration to the germination of the forage crops was 0.4% to 0.8%. The perennial ryegrass showed the highest salt tolerance in the seed germination, and the tall fescue and the creeping red fescue showed medium, and the orchardgrass showed the lowest tolerance.