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고랭지 농업에서 알팔파 재배가 토양유실 및 옥수수 생산에 미치는 영향
백계령,이정태,Bak, Gyeryeong,Lee, Jeong-Tae 한국환경과학회 2021 한국환경과학회지 Vol.30 No.2
Soil conservation management is necessary for sustainable agriculture, in highland areas, and cover crops are one of the best soil conservation methods for slopes. In this study, we evaluated the effects of alfalfa cultivation on maize production, as well as soil conservation and quality. There was an outstanding soil conservation effect with alfalfa cultivation in the fallow and maize growing seasons. In particular, alfalfa cultivation reduced soil loss by up to 98% compared with bare field. It also increased the activities of soil microorganisms and the supply of organic matter. Maize production with alfalfa cultivation showed no significant differences in yield. In conclusion, alfalfa is an advantageous perennial cover crop in highland agricultural slope areas, which can have positive effects on soil quality and conservation, as well as maize production.
건조스트레스가 감자 식물체 무기성분 및 생육에 미치는 영향
백계령,이계준,조지홍,Bak, Gyeryeong,Lee, Gyejun,Cho, Jihong 한국작물학회 2017 한국작물학회지 Vol.62 No.3
Yield of potato is largely influenced by drought stress. This study was conducted in Gangneung and Cheongju during the spring cropping of potato. Potatoes in the Gangneung area were affected by drought but there was no damage due to drought in Cheongju. During the early-growth stage, the contents of inorganic components like available phosphate and growth characteristics of the potato leaf in Cheongju were significantly higher than those in Gangneung but there was no difference after the flowering stage. It was considered that the potato plants cultivated in Cheongju could vigorously grow than that of Gangneung under drought stress. In addition, the content of calcium (Ca), which is a secondary messenger related to aging, was found to be higher in potato plants grown in Cheongju than in Gangneung and accumulated more quickly in potato plants of Cheongju. Because magnesium (Mg) was also found to be higher in potato plants from Gangneung by a wide margin, this phenomenon was thought be related with drought stress. The amounts of all inorganic components absorbed from soil were higher in Cheongju than in Gangneung, showing a relatively higher plant biomass in Cheongju. Correlations of development indexes related to leaf showed less or no relation in Gangneung. According to yield characteristics of the harvest stage, although yield was greatly reduced under drought stress condition, the rate of commercial yield was not significantly affected under the drought stress condition. Consequently, it was considered that these responses to drought stress could be utilized to stabilize potato production under the stressful conditions associated with abnormal climate.
한국 고랭지 배추 작부체계에 따른 토양, 배추 생산성 및 성분 특성 비교
백계령(Gye Ryeong Bak),이정태(Jeong Tae Lee) 한국자원식물학회 2021 한국자원식물학회지 Vol.34 No.4
김치의 재료로 우리나라에서 중요한 채소인 배추는 호냉성으로 여름에는 서늘한 고랭지역에서 주로 재배된다. 고랭지에서 배추 재배 시 주로 배추를 매년 이어짓기하거나 감자와 번갈아 가면서 재배하고 있는데, 본 연구에서는 두 가지 작부체계 하에서 토양 물리화학성, 배추 생산성 그리고 배추 무기성분의 차이를 분석하고 평가하였다. 결과적으로 토양 내 유기물, 유효인산, 칼륨(K+ )은 두 작부체계 모두 6년의 재배 이후 감소하였으며, 토양 pH는 배추 이어짓기 작부에서만 감소하였다. 표토의공극률 또한 두 작부체계에서 모두 감소하였으나 감자와 돌려짓기 작부에서는 심토의 공극률이 증가하였다. 돌려짓기 작부에서는 배추와 잎의 크기가 유의하게 높아 높은 수량을 얻었다. 식물체 분석 결과 6년의 재배 이후 두 작부체계 모두 배추의 총질소, Ca2+, Mg2+은 증가하고 총탄소와 인산함량은 감소하였는데, 총질소와 Mg2+은 이어짓기 작부에서 Ca2+은 돌려짓기 작부에서 감소하여 배추 재배 시 작부체계가 토양의 물리화학성과작물의 생산성에 영향을 줌을 시사하였다. Napa cabbage (Brassica campestris var. Pekinensis) is the main material of Kimchi so that important crop in South Korea. There are two typical napa cabbage cropping systems in the alpine area. One is cultivating napa cabbage annually while another is cultivating napa cabbage and potato biennially. In this research, we evaluated soil physiochemical properties, yield, and mineral contents of napa cabbage depending on two cropping systems. As a result, organic matter, available P2O5, exchangeable K+ was decreased after six-years of cultivation on both cropping systems. However, soil pH was only decreased in a continuous napa cabbage cropping system. Soil porosity is also decreased in both cropping systems on topsoil while is increased in rotation with potato on subsoil. The rotation system showed a significantly higher yield with a higher value of leaf and napa cabbage size than the continuous cropping system. Total nitrogen, Ca2+, and Ma2+ were increased and total carbon and phosphate decreased in both cropping systems after six-years. Especially, total nitrogen and Mg2+ were significantly higher in the continuous system while Ca2+ was higher in the rotation system. In conclusion, the cropping system influences soil physiochemical properties and plant production in an agricultural field.