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비닐하우스 재배 수수의 그루터기 재생 및 양분흡수 특성

Characteristics of Nutrient Uptake and Stubble Regrowth of Grain Sorghum in Plastic Film House

  • 윤을수 (농촌진흥청 국립식량과학원 잡곡과) ;
  • 정기열 (농촌진흥청 국립식량과학원 잡곡과) ;
  • 박창영 (농촌진흥청 국립식량과학원 잡곡과) ;
  • 황재복 (농촌진흥청 국립식량과학원 잡곡과) ;
  • 최영대 (농촌진흥청 국립식량과학원 잡곡과) ;
  • 전승호 (농촌진흥청 국립식량과학원 잡곡과)
  • 투고 : 2012.08.17
  • 심사 : 2012.11.23
  • 발행 : 2012.12.31

초록

수수의 재생력과 양분 흡수력을 이용해 시설재배지에 집적된 토양양분의 효율적 이용방법 개발을 위한 기초자료를 얻고자 비닐하우스에 수수를 재배하여 주요 생육시기별로 예취한 후 재생경의 생육 및 양분흡수 특성을 구명한 결과는 다음과 같다. 예취 후 재생경의 출수 소요일수는 유숙기 예취시 35일로 가장 짧게 나타났으며, 가장 긴 소요일수를 보인 출수기도 44일로 관행재배시보다 짧은 소요일수를 나타냈다. 예취 후의 누적 초장에서는 유숙기에서 379.4 cm로 가장 길게 나타났고, 예취 시기가 늦을수록 작은 경향을 보였으며 가장 짧은 무예취구와는 약 2배의 차이를 보였다. 그러나 수수의 Biomass는 초장과 달리 출수기 예취구가 1.73 Mg $10a^{-1}$로 가장 많은 생산량을 나타냈으며 종실은 무예취구에서 가장 많은 수량을 나타냈다. 식물체 부위별 농도에서 T-N은 잎>이삭>줄기 순으로 나타났으며, 대체적으로 생육초기인 10엽기에서 각 부위별로 높은 양분함량을 보였으며 수확시기에서는 $K_2O$를 제외한 나머지 $P_2O_5$, CaO와 MgO가 줄기보다는 잎에서 높은 함량을 보였다. 지상부의 양분흡수량은 예취시기에 따라 출수기>무예취구>유수형성기${\geq}$유숙기>10엽기 순으로 나타났다. N의 흡수량은 출수기의 $P_2O_5$을 제외한 $K_2O$, CaO, MgO은 무예취구에서 가장 많은 흡수량을 보였으며 평균 흡수량보다 모두 높은 처리구는 출수기와 무예취구로 나타났다.

This study was conducted to get the basic information for absorb enhancement of accumulated soil nutrients in plastic film house. The grain sorghum (Sorghum bicolor L.) was sowing in plastic film house which soil nutrient accumulated moderately and was cutting at major growth period of sorghum. We were analyzed the regrowth pattern, biomass due to cutting time and amount of plant nutrient of grain sorghum. The obtained results were as follows. The heading date after cutting of sorghum in plastic film house was came to about 35 days. The accumulated of plant height were the longest as 379.4 cm in cutting at milk stage. The total biomass of sorghum in cutting at heading stage was 1.73 ton $10a^{-1}$ in cutting at heading stage. The high grain yields were produced with non-cutting and cutting at 10 leaves stage as 75~113 kg $10a^{-1}$ but the lowest grain yields were the cutting plots at booting stage as below 24 kg $10a^{-1}$. The content of nutrient in sorghum plant was low as progress of growth. The concentrations in aboveground sorghum due to plant parts was in order to leaves > panicle > stalk. The nitrogen content of sorghum was 0.6~0.7% in stalk, 1.5~1.6% in panicle and 1.8~2.3% in leaves. The amount of nutrient absorbed in sorghum was 4.2 kg $10a^{-1}$ in nitrogen, 1.7 kg $10a^{-1}$ phosphorus and 7.7 kg $10a^{-1}$ in potassium and the absorbing different by cutting time in order to booting > non-cutting > panicle formation ${\geq}$ milk ripe > 10 leaves stage.

키워드

참고문헌

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피인용 문헌

  1. Weed Control Efficacy of the Residues and its Aqueous Extract of Sorghum Shoots vol.4, pp.3, 2015, https://doi.org/10.5660/WTS.2015.4.3.243
  2. Evaluation of Seed Vigor and Morphology by Varietal Difference of Sorghum (Sorghum bicolor (L.) Moench) vol.59, pp.4, 2014, https://doi.org/10.7740/kjcs.2014.59.4.457