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Annual Increase in Carbon and Nitrogen Stocks of Trees and Soils in a ‘Niitaka’ Pear Orchard Following Standard Fertilization Recommendations

표준 시비에 따른 ‘신고’배 수체 및 재배지 토양의 탄소 및 질소 저장량 변화

Hee-Myong Ro12*
,
Jin-Ho Choi3
,
Seo-Yeon Lee1
,
Tae-Kyu Lee1
,
Jong-Sung Kim1
,
Ji-Suk Park1
,
Jang-Jeon Choi3
,
Min-Jin Lee1
노 희명12*
,
최 진호3
,
이 서연1
,
이 태규1
,
김 종성1
,
박 지숙1
,
최 장전3
,
이 민진1
1Department of Agricultural Biotechnology and Research Institute of Agriculture and Life Sciences, Seoul National University
2Research Institute of Agriculture and Life Sciences, Seoul National University
3Pear Research Station, National Institute of Horticultural & Herbal Science, Rural Development Administration
1서울대학교 농생명공학부
2서울대학교 농업생명과학연구원
3농촌진흥청 국립원예특작과학원 배시험장
*교신저자. *Corresponding Author. 
31 August 2015. pp. 591-597
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Abstract

We determined the total C and N stocks in trees and soils after 1 year of fertilization in an experimental orchard with 16-year-old ‘Niitaka’ pear (Pyrus pyrifolia Nakai cv. Niitaka) trees planted at 5.0 m × 3.0 m spacing on a Tatura trellis system. Pear trees were fertilized at the rate of 200 kg N, 130 kg P and 180 kg K ha-1. At the sampling time (August 2013), trees were uprooted, separated into six fractions [trunk, main branches, lateral branches (including shoots), leaves, fruit, and roots] and analyzed for their total C and N concentrations and dry masses. Soil samples were collected from 0 to 0.6 m in 0.1 m intervals at 0.5 m from the trunk, air-dried, passed through a 2-mm sieve, and analyzed for total C and N concentrations. Undisturbed soil core samples were also taken to determine the bulk density. Dry mass per tree was 5.6 kg for trunk, 12.0 kg for main branches, 15.7 kg for lateral branches, 5.7 kg for leaves, 9.8 kg for fruits, and 10.5 kg for roots. Total amounts of C and N per tree were respectively 2.6 and 0.02 kg for trunk, 5.5 and 0.04 kg for main branches, 7.2 and 0.07 kg for lateral branches, 2.6 and 0.11 kg for leaves, 4.0 and 0.03 kg for fruit, and 4.8 and 0.05 kg for roots. Carbon and N stocks stored in the soil per hectare were 155.7 and 14.0 Mg, respectively, while those contained in pear trees were 17.8 and 0.2 Mg･ha-1 based on a tree density of 667 trees/ha. Overall, C and N stocks per hectare stored in the pear orchard were 173.6 and 14.2 Mg, respectively. Compared with results obtained in 2012, the amounts of C stocks have increased by 17.7 Mg･ha-1, while those of N stocks remained virtually unchanged (0.66 Mg･ha-1).

Keywords
carbon sequestration
fertilizer
IPCC 2006 guidelines
net primary productivity
pear orchard

IPCC 2006 지침에서 제시한 Tier 3 수준에 맞게 배나무 과수원의 온실가스 저장량을 산정하기 위하여, ‘신고(Pyrus pyrifolia Nakai cv. Niitaka)’ 배 재배지를 대상으로 1년 시비에 따른 과수와 재배지 토양의 총 탄소와 질소 저장량을 평가하였다. 이를 위해 전라남도 나주에 위치한 농촌진흥청 배시험장 재배포장에서 5.0 × 3.0으로 재식된 Y수형의 16년생 ‘신고’배에 질소와 인, 칼륨비료를 각각 200kg N･ha-1, 130kg P･ha-1, 180kg K･ha-1 시비하였다. 2013년 8월, 배나무 수체와 토양의 총탄소와 질소 함량을 평가하기 위해 샘플을 채취하였다. 과수는 굴취하여 주간, 주지, 측지, 잎, 과일, 뿌리로 분류하여, 총탄소와 질소 함량, 건중량을 조사하였다. 토양은 과수 주간으로부터 약 0.5m 떨어진 지점에서 0.6cm 깊이까지 0.1m 간격으로 토양을 채취하여, 풍건한 뒤 2mm체에 통과시킨 시료를 채취하여 총탄소와 질소 함량을 분석하였다. 나무 한 그루당 건중량은 주간은 5.6kg, 주지는 12.0kg, 측지는 15.7kg, 잎은 5.7kg, 과일은 9.8kg, 뿌리가 10.5kg 이었다. 나무 한 그루당 총탄소와 질소 함량은 주간에서 2.6C kg, 0.02N kg였고, 주지는 5.5C kg, 0.04N kg, 측지는 7.2C kg, 0.07N kg, 잎은 2.6C kg, 0.11N kg, 과일은 4.0C kg, 0.03N kg, 뿌리에서는 4.8C kg, 0.05N kg이였다. 재식밀도(667trees/ha)를 기준으로 산정하였을 때, 토양에 저장되는 탄소량은 155.7Mg, 질소량은 14.0 Mg이였으며, 수체에 저장되는 탄소량은 17.8Mg･ha-1, 질소량은 0.2Mg･ha-1이였다. 따라서 배나무 재배지 내에 저장되는 총탄소량은 173.6Mg였으며, 질소량은 14.2Mg이었다. 이를 작년 2012년 결과와 비교하였을 때, 1년 시비 결과 배 과수원의 탄소 저장량은 17.7Mg･ha-1 증가하였으나, 질소 저장량은 변화가 거의 없었다(0.66Mg･ha-1).

키워드
탄소 격리량
비료 시비
IPCC 2006 guideline
순 1차 생산량
배 재배지
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Information
  • Publisher :KOREAN SOCIETY FOR HORTICULTURAL SCIENCE
  • Publisher(Ko) :한국원예학회
  • Journal Title :Horticultural Science and Technology
  • Journal Title(Ko) :원예과학기술지
  • Volume : 33
  • No :4
  • Pages :591-597
  • Received Date : 2014-11-17
  • Revised Date : 2015-03-10
  • Accepted Date : 2015-04-01
  • DOI :https://doi.org/10.7235/hort.2015.14091
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