CAJ | 학술논문

　　通过林地调查和室内分析化验，结果表明广西钦州市桉树二代萌芽林林地土壤酸性、有机质、全N、水解N、全K、速效K含量均降低；土壤磷素含量降低，全P含量为0.28~0.38g·kg-1、有效P含量为0.3~1.1mg·kg-1；Cu、B的含量也降低，且B含量偏低，仅为0.01~0.03 mg·kg-1。针对上述结果，提出了相应的测土配方施肥方案。分别以普通HA桉树肥、桉树专用肥、鸡粪+普通复合肥和钦州市林科所桉树配方复混肥4种肥料进行施肥对比试验，寻找最佳施肥方式。试验表明：尾巨桉施肥肥效明显，施用几种肥料对桉树二代萌芽林生长量均有显著促进作用，不同种类的肥料对桉树二代萌芽林前期生长量的肥效差别主要受肥料总养分含量、N、P、K百分含量及养分的合理配比影响。不同处理萌芽林分间的保留株数、树高、胸径、材积及蓄积均达极显著水平，钦州市林科所桉树配方复混肥较适合当地桉树二代萌芽林林木生长，3年生单株材积及蓄积量分别达到0.076 m3·株-1、105.396 m3·hm-2。
　　통과임지조사화실내분석화험，결과표명엄서흠주시안수이대맹아림임지토양산성、유궤질、전N、수해N、전K、속효K함량균강저；토양린소함량강저，전P함량위0.28~0.38g·kg-1、유효P함량위0.3~1.1mg·kg-1；Cu、B적함량야강저，차B함량편저，부위0.01~0.03 mg·kg-1。침대상술결과，제출료상응적측토배방시비방안。분별이보통HA안수비、안수전용비、계분+보통복합비화흠주시림과소안수배방복혼비4충비료진행시비대비시험，심조최가시비방식。시험표명：미거안시비비효명현，시용궤충비료대안수이대맹아림생장량균유현저촉진작용，불동충류적비료대안수이대맹아림전기생장량적비효차별주요수비료총양분함량、N、P、K백분함량급양분적합리배비영향。불동처리맹아림분간적보류주수、수고、흉경、재적급축적균체겁현저수평，흠주시림과소안수배방복혼비교괄합당지안수이대맹아림림목생장，3년생단주재적급축적량분별체도0.076 m3·주-1、105.396 m3·hm-2。
Based on investigations at plantation sites and indoor chemical analyses of soils under secondrotationcoppice plantations of Eucalyptus urophylla×E.grandisin Qinzhou, the results showed that:soil acidity, organic matter, total N, hydrolytic N, total K and available K contents decreased; soil phosphorus content decreased;total P was 0.28~0.38g·kg-1;P effective content was 0.3~1.1mg·kg-1;content of Cu and B were decreased; and, the content of B was low at only 0.01~0.03 mg·kg-1. In order to find out the best fertilization prescription to address the soil nutrient limitations and deficiencies found, a number of alternate soil fertilizer regimes were designed:common HA Eucalyptus fertilizer;Eucalyptus special fertilizer, manure+ common compound fertilizer;and, the formula compound fertilizer for Eucalyptus of Qinzhou Forest Institute. The applied fertilizershad marked beneficial effects on the growth of E. urophylla×E.grandis. The effect on the growth of early second rotation coppice plantation of E.urophylla×E.grandiswas influenced by:total nutrient concentration;percentages of N, P and K;and, the rational proportion of thesethree elements. The results showed significant differences between fertilizer treatments for average DBH,height and volume increment in the second rotation coppice. The Qinzhou Forest Institute’s compound fertilizer formula proved the most suitable for secondrotation coppice plantations of E.urophylla×E.grandis, with individual tree volume and yield reaching 0.076 m3·tree-1 and 105.4 m3·hm-2at age three years.