CAJ | 학술논문

采用山毛豆（Tephrosia candida）、184柱花草（Styiosanthes guianensis）和桂牧1号杂交象草（ Pennisetun americanum × Pennlsetum purpureum ）×Pennisetum purpureum cv．Mott在桉树林下间种，间种方式有2种：桉树密度3m×2m，行间问种牧草；桉树密度6m×2m，行间间种牧草。不间种为对照。目的是探索在桉树林下间种牧草后，对桉树林地土壤肥力，地表径流量的影响。经2年试种，与本底调查情况（种植前）相比，种植密度A（3m×2m）林地土壤pH、有机质、全量N、全量P205、速效P和代换性Mg均表现出不同程度的提高，增幅为7．59％～110．00％；土壤A层有机质含量比桉树纯林平均提高14．47％，比本底调查平均提高35．54％。种植密度B（6m×2m）林地土壤pH、有机质、全量N、全量P205、速效P和代换性Mg均表现出不同程度的提高，增幅为2．78％～135．71％；土壤A层有机质含量比桉树纯林平均提高57．45％，比本底调查平均提高36．76％。桉树间种牧草的地表径流量与桉树纯林相比，2年桉树＋桂牧1号模式地表径流量分别降低了30．82％和21．07％。桉树林下间种牧草，不但可增加土壤矿质元素的含量，而且还能促进桉树的生长，减少了水土流失，保护了生态环境。
채용산모두（Tephrosia candida）、184주화초（Styiosanthes guianensis）화계목1호잡교상초（ Pennisetun americanum × Pennlsetum purpureum ）×Pennisetum purpureum cv．Mott재안수림하간충，간충방식유2충：안수밀도3m×2m，행간문충목초；안수밀도6m×2m，행간간충목초。불간충위대조。목적시탐색재안수림하간충목초후，대안수임지토양비력，지표경류량적영향。경2년시충，여본저조사정황（충식전）상비，충식밀도A（3m×2m）임지토양pH、유궤질、전량N、전량P205、속효P화대환성Mg균표현출불동정도적제고，증폭위7．59％～110．00％；토양A층유궤질함량비안수순림평균제고14．47％，비본저조사평균제고35．54％。충식밀도B（6m×2m）임지토양pH、유궤질、전량N、전량P205、속효P화대환성Mg균표현출불동정도적제고，증폭위2．78％～135．71％；토양A층유궤질함량비안수순림평균제고57．45％，비본저조사평균제고36．76％。안수간충목초적지표경류량여안수순림상비，2년안수＋계목1호모식지표경류량분별강저료30．82％화21．07％。안수림하간충목초，불단가증가토양광질원소적함량，이차환능촉진안수적생장，감소료수토류실，보호료생태배경。
Such 3 pastures as Tephrosia candida , StyIosanthes guianensis and （ Penniseturn arneri- canu x Pennisetumpurpureurn ） x Penniseturn purpureurn cv. Mort were interplanted in Eucalyptus plantation. After 2 years, compared with baseline survey, soil pH, organic matter, total N, total P2O5, available P and exchangeable Mg increased at different levels, ranging from 7.59% to 110.00 % with the density of 3m x 2m. Content of organic matter in A layer of soil averagely increased by 14.47 % than that of Eucalyptus pure plantation, 35.54 % higher than baseline survey. Soil pH, organic matter, total N, total P2O5, available P and exchangeable Mg increased at different levels,ranging from 2.78 % to 135.71% with the density of 6m × 2m. Content of organic matter in A layer of soil averagely increased by 57.45 % than that of Eucalyptus pure plantation, 36.76 % higher than baseline survey. Compared with pure plantation of Eucalyptus, runoff of 2-year-old Eucalyptus plantation interplanted with （Pennisetun arnericanum × Pennisetum purpureum ） x Pennisetum purpureum cv. Mort decreased by 30.82% and 21.07% respectively. The model of growing pasture in Eucalyptus plantation not only increased the content of soil mineral substance, but also improved the growth of Eucalyptus, decreased soil and water erosion and protected ecological environment.