Changes in Growth and Nutrient Contents of Populus ablba var. pyramidalis treated with Fertilizers and Absorbents in an Arid Region of China

중국 건조지역에서 시비와 보수제 처리에 의한 신강포플러의 생장 및 묘목의 양분 함량 변화

  • Kyung, Ji Hyun (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Son, Yohwan (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Noh, Nam Jin (Division of Environmental Science and Ecological Engineering, Korea University) ;
  • Yi, Myong Jong (Division of Forest Resource, Kangwon National University) ;
  • Lee, Chun Yong (Division of Forest Soil Conservation, Korea Forest Research Institute) ;
  • Youn, Ho Joong (Division of Forest Soil Conservation, Korea Forest Research Institute)
  • 경지현 (고려대학교 환경생태공학부) ;
  • 손요환 (고려대학교 환경생태공학부) ;
  • 노남진 (고려대학교 환경생태공학부) ;
  • 이명종 (강원대학교 산림자원학부) ;
  • 이천용 (국립산림과학원 임지보전과) ;
  • 윤호중 (국립산림과학원 임지보전과)
  • Received : 2006.09.14
  • Accepted : 2006.09.29
  • Published : 2006.12.30

Abstract

To investigate soil management practices for increasing tree growth in arid regions of China, Xinjiang poplar (Populus alba var. pyramidalis) seedlings were planted in a nursery and windbreak and were treated with fertilizers (nitrogen and phosphorus) and absorbents (artificial; K-SAM and natural: Yuho (Artemisia ordosica)) at Dengkou in Inner Mongolia. Seedling height, diameter at breast height (DBH), biomass, and nitrogen (N) and phosphorus (P) concentrations were measured 1.5 years after the treatments. Soil texture was sandy loam for nursery and clay loam for windbreak, soil pH was 8.78 for nursery and 8.51 for windbreak, and total soil N concentration was 0.06% for nursey and 0.08% for windbreak. [n general, seedling height and DBH increased in the N fertilizer treatment compared to control or other treatments both in nursery and windbreak. Also seedling growth increased after the treatments of artificial and natural absorbents in windbreak. Total above- and belowground biomass increased after the N + P treatment. Foliage N and P concentrations following N and/or P treatments were same in the nursey, however, they significantly increased in the windbreak indicating N deficiency. It appeared that N was a limiting factor for early growth of Xinjiang poplar seedlings and artificial and natural absorbents (K-SAM and Yuho) would be useful to increase seedling growth in the arid region.

중국 건조지역에서 임목 생장을 촉진시키기 위한 토양 개선 방안을 모색하기 위하여 내몽골 자치구 내 Dengkou지역에 묘포장과 방풍림을 조성한 다음 신강포플러(Populus alba var. pyramidalis) 묘목을 식재하고, 시비(질소, 인) 및 보수제(인공보수제; K-SAM, 자연보수제 Yuho(Artemisia ordosica))를 처리하였다. 처리 후 1년 6개월이 지난 다음 묘고, 흉고직경, 생체량, 그리고 묘목 내 질소와 인의 농도 등을 측정하였다. 묘포장과 방풍림 내 토양은 사양토와 식양토로 분류되었고, pH는 8.78과 8.51로 약알칼리성을 띠었으며, 전질소 농도는 각각 0.06%와 0.08%로 나타났다. 묘포장과 방풍림에서 일반적으로 질소(N) 처리 후 무처리나 다른 처리보다 묘고 및 흉고직경 생장이 증가되었으며, 특히 방풍림의 경우 인공 및 자연보수제 처리 후 생장이 증가되었다. 묘포장에서 질소와 인(N+P) 복합 시비 후 지상부와 지하부를 합한 총 생체량이 증가되었다. 질소나 인의 시비가 묘목 내 이들 양분 농도에 미치는 영향은 묘포장에서 뚜렷하지 않았으나, 방풍림에서는 질소 시비 후 잎 대 질소 농도가 크게 증가하여 토양 내 질소가 결핍된 상태를 보였다. 건조지역에서 신강포플러 묘목의 초기 생장에 질소가 가장 큰 영향을 미치며, 인공보수제인 K-SAM과 자연보수제인 Yuho도 묘목의 생장을 증가시켜 이들을 향후 토양 조건 개선에 활용할 수 있을 것으로 보인다.

Keywords

Acknowledgement

Grant : 사막화방지를 위한 수목 선발, 목초지 조성기술

Supported by : 환경부

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