참깨의 단경, 분지형에 있어서 인산함량이 함유율과 지상부 생육에 미치는 영향

The Effects of Phosphate to the Growth and Oil Contents in Sesame(Sesamum indicum L.)

참깨의 현장려 품종중 단경형과 분지형 두 품종에 대한 인산의 시비수준에 따른 생육시기별 지상부 생육 및 함유량을 조사한 결과 가. 광합성량은 초기(파종후 6주까지)에는 풍년깨가 후기에는 광산깨가 높았으며, 두 품종 모두 인산10a당4 시용구에서 광합성이 가강 높았다. 나. 인산의 시비수준에 따라 식물체의 무기성분 함량간에는 큰 차이는 없었으나, 시기별 인산함량은 파종후 3주가, 질소와 가리는 파종후 6주가 가장 높았고, 엽분석결과 인산함량과 지방과는 0.48＊, 가리함량과 탄수화물과는 0.57＊＊로서 모두 유의성이 인정되었다. 다. 개화최성기(7월 15일)의 광합성능력과 상대생장율(RGR) 및 순동화율(NAR)간에는 품종별로는분지형인 광산깨가 인산시용량간에는 10a당 4kg시용구에서 가장 높았다. 라. 참깨의 품종별 종실중은 풍년깨는 10a당 4kg시용구가, 광산깨는 10a당8kg시용구가 가장 많았으나, 동일종실중에 대한 함유량은 두 품종 모두 인산의 시비량이 많을수록 증대되었다.

Effects of phosphorous fertilizer on the growth habit and yield of monoculm and branch types of two leading sesame varieties was investigated. The photosynthetic rate of at each growing stage was high at the flowering stage. The photosynthetic rate of monoculm sesame variety, Pungnyeon was high prior to flowering stage, while the Kwangsan variety, branch type was high after the flowering stage. The level of phosphate were most effective in increasing photosynthesis when standard level of fertilizer was applied in both varieties. Kwangsan variety showed higher photosynthetic rate per unit area, higher NAR, and CGR and higher LAR and RGR at the maximum flowering stage than the Pungnyoeon variety. Those characters attained maximum level when standard levels of phosphorous fertilizer were applied. The protein and oil content of seeds were higher in Kwangsan variety compared with Pungnyeon. However, the carbohydrate of seeds was high for Pungnyeon variety. The highest protein content was attained when standard level of fertilizer were applied. The oil content appeared to increase as the level of applied fertilizer increased. The results suggest that the vegetative growth and seed yields of sesame may be enough with present level of fertilizers. However, higher amount of phosphorous fertilizer may be required to increase the oil content of sesame seeds.