무피복 재배조건에서 생육특성 및 수량성 그리고 종실의 단백질과 지방함량, 지방산 조성을 조사하여 무피복 재배법 확립을 위한 기초자료를 얻고자 대광땅콩, 대풍땅콩을 공시하고 흑색 비닐 피복재배와 비교하여 시험한 결과는 다음과 같다. 1. 출현기는 대광땅콩, 대풍땅콩 모두 피복재배보다 6일정도 지연되었으며 개화기는 각각 9일, 6일 지연되었고 입모율도 각각 3.7％, 16％감소되었다. 2. 분지장은 피복재배보다 대광땅콩 24％(11.2cm), 대풍땅콩 17％(6.9cm) 감소되었으나 분지수는 감소되지 않았다. 3. 성숙협수,100립중, 협실비율, 주당 종실수량등은 피복재배보다 현저히 감소되었으나 밀식재배로 인한 재식밀도의 증가로 1ha당 종실수량은 대광땅콩의 경우 피복재배와 비슷하였고 대풍땅콩의 경우는 26％ 증수되었다. 4. 단백질함량은 대광땅콩의 경우, 피복재배보다 4％ 증가하였으나 대풍땅콩은 3％ 감소하였으며 지방함량은 두 품종 모두 각각 7％, 9％ 감소되었다. 5. 지방산 조성에서 oleic acid는 대광, 대풍땅콩 모두 피복재배보다 증가하였으나 linolelc acid는 감소하였으며 O/L비율도 작아졌다.

Flowering date of peanut variety, Daekwangtangkong and Daepungtangkong in non-mulching culture was delayed each 9 and 6 days. Seedling ratio was decreased each 3.7%, 16% and branch length was decreased each 24%, 17% more than polyethylene film mulching culture. But the number of branch in non-mulching culture was not reduced. No. of mature pods, kernel/pod ratio, 100-seed weight and kernel weight per plant was reduced extremely in non-mulching culture, nevertheless the kernel yield per 1 ha of Daekwangtangkong in non-mulching culture was similar to that of polyethylene film mulching culture but yield of Daepungtangkong was 26% higher than that of polyethylene film mulching culture owing to planting density. Protein content of Daekwangtangkong in non-mulching culture was increased 4% but that of Daepungtangkong was decreased 3% and oil content of both variety was decreased 7%, 9% respectively comparing to polyethylene film mulching culture. Oleic acid was increased but linoleic acid was decreased and O/L ratio was decreased in non-mulching culture.

• 박장환(작물시험장)
• 김석동(작물시험장)
• 이성우(작물시험장)