CAJ | 학술논문

通过原位网袋法，研究6、12、20 a 和28 a 4组林龄橡胶凋落叶在不同调控措施下1 a 内的分解过程。结果表明：橡胶凋落叶在0.07 mm 和1.00 mm 孔径网袋内分解趋势基本一致，表现为随时间变化分解呈现先快后慢2个阶段，经1 a 分解后，0.07 mm 和1.00 mm 孔径网袋内残留率分别为36.84％和32.09％。橡胶凋落叶分解速率不仅受埋层位置影响，还与土壤肥力有关。经240 d 分解后，地上组（0 cm）和在保留根系下非肥坑地下组（0～30 cm）、肥坑地下组（0～30 cm）残留率分别为32.09％、7.40％和34.58％。土壤肥力对橡胶凋落物分解的影响主要体现在分解中后期，至240 d 时，4块林地肥坑和非肥坑平均残留率（保留根系组＋去除根系组平均值）分别为35.62％和8.46％。6、12、20 a 和28 a 林龄4组橡胶凋落叶原位埋置分解中，前期分解速率差异小，后期分解速率呈显著差异，至240 d 时，残留率分别为2.94％、7.05％、14.62％和2.18％。橡胶根系前期促进凋落物分解，后期转为抑制，但橡胶根系没有显著性改变凋落物的分解速率。
통과원위망대법，연구6、12、20 a 화28 a 4조림령상효조락협재불동조공조시하1 a 내적분해과정。결과표명：상효조락협재0.07 mm 화1.00 mm 공경망대내분해추세기본일치，표현위수시간변화분해정현선쾌후만2개계단，경1 a 분해후，0.07 mm 화1.00 mm 공경망대내잔류솔분별위36.84％화32.09％。상효조락협분해속솔불부수매층위치영향，환여토양비력유관。경240 d 분해후，지상조（0 cm）화재보류근계하비비갱지하조（0～30 cm）、비갱지하조（0～30 cm）잔류솔분별위32.09％、7.40％화34.58％。토양비력대상효조락물분해적영향주요체현재분해중후기，지240 d 시，4괴임지비갱화비비갱평균잔류솔（보류근계조＋거제근계조평균치）분별위35.62％화8.46％。6、12、20 a 화28 a 림령4조상효조락협원위매치분해중，전기분해속솔차이소，후기분해속솔정현저차이，지240 d 시，잔류솔분별위2.94％、7.05％、14.62％화2.18％。상효근계전기촉진조락물분해，후기전위억제，단상효근계몰유현저성개변조락물적분해속솔。
Leaf-litter of 6-year-old,12-year-old,20-year-old and 28-year-old rubber plantations was used to studied the decomposition progress in one year under different control measures by mesh bag method.The results as following:leaf-litter in 0.07 mm and 1.0 mm mesh bags was in a same decomposition dynamic,which was in-creased first and then drop,and the litter residues rates at the end of year were 36.84 % and 32.09 %,respec-tively.Leaf-litter decomposition rates not only by the position of the buried layer influence,but also with soil fertility-related.After 240 d,litter residues of ground plane (0 cm),comparison hole (0 -30 cm)and fertile hole (0 -30 cm)not included roots removed were 32.09%,7.40% and 34.58%,respectively.Litter decomposition of rubber was reflected by soil fertility mainly focus on the late stage of decomposition.To 240 d,residues of litter in comparison hole and fertile hole (the average value of the group of roots reserved and roots removed)were 8.46% and 35.62%,respectively.The difference of litter decomposition rates of 6-year-old,12-year-old,20-and 28-year-old rubber plantations were little at early stage but significant at late stage.To 240 d,residues of litter were 2.94%,7.05%,14.62% and 2.18%,respectively.Although rubber roots promoted litter decomposition at early stage,and convert to inhibition at the late stage,no significant influence was detected about rubber roots on litter decomposition at all stages.