• 한국산림과학회지
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• 제95권2호
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• pp.177-182
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• 2006

Little information is available on soil $CO_2$ efflux and crop yield under agroforestry systems. Soil $CO_2$ efflux, microbial biomass C, live fine root biomass, and cotton yield were measured under a pecan (Carya illinoinensis K. Koch)-cotton (Gossypium hirsutum L.) alley cropping system in southern USA. A belowground polyethylene root barrier was used to isolate tree roots from cotton which is to provide barrier and non-barrier treatments. The barrier and non-barrier treatment was randomly divided into three plots for conventional inorganic fertilizer application and the other three plots for organic poultry litter application. The rate of soil $CO_2$ efflux and the soil microbial biomass C were affected significantly (P < 0.05) by the fertilizer treatment while no significant effect of the barrier treatment was occurred. Cotton lint yield was significantly (P < 0.0 I) affected by the root barrier treatment while no effect was occurred by the fertilizer treatment with the yields being greatest ($521.2kg\;ha^{-1}$) in the root barrier ${\times}$ inorganic fertilizer treatment and lowest ($159.8kg\;ha^{-1}$) in the non-barrier ${\times}$ inorganic fertilizer treatment. The results suggest that the separation of tree-crop root systems with the application of inorganic fertilizer influence the soil moisture and soil N availability, which in tum will affect the magnitude of crop yield.

• 한국환경생태학회지
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• 제28권2호
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• pp.263-269
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• 2014

본 연구는 사막화가 진행 중인 몽골의 엘센타사라이 지역을 중심으로, 주민 설문조사, 조림지 현장답사, 관련 문헌고찰 등을 통해 환경생태적 및 경제적 효과를 동시에 달성할 산림농업의 전략을 모색하였다. 산림농업의 접근유형은 사막화 및 작물 풍해를 방지하기 위한 방풍조림, 소득자원 생산을 위한 농경, 대상지역의 주 산업인 축산 등을 함께 배합하는 농림축혼업을 제안하였다. 주민의견과 생육환경을 반영하여, 조림수종은 사막지대의 자생종인 시베리아포플러와 비술나무를, 경제작목은 짧은 생장기간에 재배 및 수확이 가능한 갈매보리수, 감자, 사료작물 등을 각각 선정하였다. 농림축혼업의 다목적 효과를 충족시킬 토지배분 전략으로서, 다열의 방풍용 수목과 소득용 작물을 교호 대상으로 배식하는 간작기법을 권장하였다. 아울러 강풍과 건조에 대응하여, 경제작목 생산 및 수목생장의 조건을 함께 개선하기 위한 간작 시스템 관련 바람직한 식재기법을 모색하였다. 본 결과는 관련 연구가 미흡한 몽골은 물론 유사한 환경의 반건조지역에서, 지속가능한 산림농업을 추진하기 위한 유용한 기반정보가 될 것으로 기대한다.

• Asian-Australasian Journal of Animal Sciences
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• 제8권3호
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• pp.231-239
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• 1995

Alley cropping field experiment has been carried out for 24 months in lime-stone based dryland farming area of southern Bali to study the chemical composition and nutritive value of 16 provenances of Gliricidia sepium The design was a completely randomized block: arrangement, consisted of 16 treatments (G. sepium provenances) and 6 blocks as replications with 12 plants per provenance. Of the 16 gliricidia provenances, six were from Mexico (M), four were from Guatemala (G), one each was from Colombia (C), Indonesia (I), Nicaragua (N), Panama (P), Costa Rica (R) and Venezuela (V). After 12 months establishment, the gliricidia were lopped at 150 cm height regularly 4 times a year, twice during the 4 months wet season and twice during the 8 months dry season. The highest ash, mineral, total soluble phenol, prussic acid and digestibility were in V1; the highest crude fiber component was in M39; the highest gross energy was in P13, while the highest organic matter was in M35. Based on the highest nutritive constituents, V1, C24 and G14 were ranked first, second and third respectively, while based on the lowest non-nutritive constituents C24, V1 and N14 were ranked first, second and third, respectively. The importance of such provenances as source of nutrients for the ruminant during the dry season were discussed.

• Asian-Australasian Journal of Animal Sciences
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• 제8권2호
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• pp.195-200
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• 1995

The design of this field experiment was a completely randomized block arrangement, consisted of 16 treatments (Gliricidia sepium provenances) and 6 blocks as replications with 12 plants per provenance. Of the 16 gliricidia provenances, six were from Mexico (M), four were from Guatemala (G), and one each was from Colombia (C), Indonesia (I), Nicaragua (N), panama (P), Costa Rica (R), and Venezuela (V). After 12 months establishment the gliricidia were lopped regularly 4 times a year, twice during the 4 months wet season and twice during the 8 months dry season at 150 cm height. There was variation (p < 0.05) in stem elongation from 22 to 80 cm, leaf retained from 118 to 209%, branch number from 13 to 24, fodder yield from 1,015 to 1,671 g DW/plant and wood yield from 792 to 1,662 g DW/plant among the provenances; and such variations were affected by the seasons. Belen (N14), Retalhuleu (G14) and Bukit Bali (I) provenances were ranked first, second and third, respectively, measured in terms of leaf retention, stem elongation, fodder and wood yields during the wet and dry seasons.