Effect of Winter Rye Cultivation to Improve Soil Fertility and Crop production in Alpine Upland in Korea

동계호밀재배가 고랭지 밭토양의 비옥도 증진에 미치는 영향

  • 장용선 (농촌진흥청 고령지농업연구소) ;
  • 이계준 (농촌진흥청 고령지농업연구소) ;
  • 주진호 (강원대학교 자원생물환경학과) ;
  • 이정태 (농촌진흥청 고령지농업연구소) ;
  • 안재훈 (농촌진흥청 고령지농업연구소) ;
  • 박철수 (KT&G 중앙연구원)
  • Published : 2007.12.31


Soil erosion is one of the most serious problems in alpine upland in Korea. Soil fertility has continuously decreased due to serious soil erosion. To increase soil fertility, new sources of organic matter should be inputted. Therefore, the objectives of this research were to select winter cover crop as new sources of organic matter and to investigate the effect of winter cover crop on soil property changes, major crop productivity (Chinese cabbage, potato) production in highland, and disease occurrence with different cropping systems. Among 17 candidates for winter coverage crop, rye was most suitable due to it's soil covering rate, and over-wintering rate. The optimum sowing period for rye ranged from late August to late September. Soil porosity and organic matter content increased with rye cultivation. Rye cultivation during winter increased amounts of crop (both Chinese cabbage and potato) productivity up to 8%. There was little difference on amount of crop productivity depending on cropping systems such as monoculture (Chinese cabbage or potato) and Chinese cabbage-potato rotation.

고랭지 밭토양의 동계 피복작물재배에 따른 밭토양의 지력증진과 증수효과를 분석하기 위하여 고랭지의 주요 재배작물인 감자와 배추를 대상으로 고랭지 농업지대에 적합한 동계 피복작물을 선발하고, 피복작물재배가 토양의 물리-화학적 특성 변화에 미치는 영향, 고랭지 작물의 생산성 및 병해발생 정도를 작부체계와 연계하여 비교 검토하였다. 고랭지에서 월동성이 가장 우수한 피복작물은 17개 시험초종 중 호밀이었으며, 호밀의 적정 파종기는8월 하순부터 9월 하순으로 10월 상순 서리가 내리기 이전까지는 파종하여야 할 것으로 판단되며, 토양의 물리-화학성은 윤작과 동계 호밀재배로 토양 공극 및 유기물 함량이 증가하는 경향으로 윤작보다 동계호밀재배에 의한 토양 물리성 개선 및 토양 화학성분의 함량증가가 현저하였다. 고랭지 감자와 배추에 대하여 매년 윤작으로 작부체계를 검토한 결과 동계호밀재배는 나지에 비하여 작부체계와 관계없이 수량은 $6{\sim}8%$증가하였다. 동계 호밀재배에 의한 토양관리 방법은 토양유실 방지효과와 더불어 감자의 수확량 증대, 감자의 병해 발생률을 감소시키므로 우량 씨감자 생산을 위한 새로운 농업기술로 적용되어야 할 것으로 생각된다.


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