CAJ | 학술논문

以怀宁县皖河滩地杨树林为研究对象，对修枝前后林木与土壤中的养分含量进行了研究。结果表明：（1）一定修枝强度下，修枝对杨树的树高和胸径生长影响显著（P〈0．05），但随着修枝强度增大对树高生长的影响是先增大后减小，而对胸径的影响是一直增大。（2）修枝会降低林地土壤全氮含量，但对土壤全氮、全磷、速效磷和钾含量影响不显著（P〉0．05）。（3）修枝对不同土层深度土壤养分影响不显著（P〉0．05），但全氮、全磷、速效磷含量均随着土层深度的加深而逐渐减少，钾、钙、镁含量基本相同；同一修枝强度下，各种养分含量在不同方向基本持平，只有钙的含量在每个方向都是以轻度修枝最大。（4）植物各器官中，全氮含量以根最高，3种修枝强度下，随着年龄增大枝的全氮含量降低，根的全氮含量增加。同时，修枝对上部枝的全氮含量影响显著（P〈0．05）；修枝强度对中部枝和大于5mm根的全氮含量影响显著（P〈0．05）；修枝对植物各组分全磷含量影响不显著（P＞0．05）；除中部枝的钙含量在轻度修剪与强度修剪有显著差异外（P〈0．05），修枝对植物钾、钙、镁的影响不显著（P〉0．05），但随着枝的生长钾、钙、镁的含量有降低的趋势；随着根的生长，钾、钙、镁的含量变化规律不明显。
이부저현환하탄지양수림위연구대상，대수지전후림목여토양중적양분함량진행료연구。결과표명：（1）일정수지강도하，수지대양수적수고화흉경생장영향현저（P〈0．05），단수착수지강도증대대수고생장적영향시선증대후감소，이대흉경적영향시일직증대。（2）수지회강저임지토양전담함량，단대토양전담、전린、속효린화갑함량영향불현저（P〉0．05）。（3）수지대불동토층심도토양양분영향불현저（P〉0．05），단전담、전린、속효린함량균수착토층심도적가심이축점감소，갑、개、미함량기본상동；동일수지강도하，각충양분함량재불동방향기본지평，지유개적함량재매개방향도시이경도수지최대。（4）식물각기관중，전담함량이근최고，3충수지강도하，수착년령증대지적전담함량강저，근적전담함량증가。동시，수지대상부지적전담함량영향현저（P〈0．05）；수지강도대중부지화대우5mm근적전담함량영향현저（P〈0．05）；수지대식물각조분전린함량영향불현저（P＞0．05）；제중부지적개함량재경도수전여강도수전유현저차이외（P〈0．05），수지대식물갑、개、미적영향불현저（P〉0．05），단수착지적생장갑、개、미적함량유강저적추세；수착근적생장，갑、개、미적함량변화규률불명현。
In this paper the Yangtze River marshland poplar plantations in Huaining County of Anhui Province were selected as the study objects. The＇ nutrient contents in the poplar and soil before and after pruning were studied. The results showed：（1） Pruning of a certain intensity had significant effects on the height and DBH growth of poplar（p〈0.05）. The height growth increased first and then decreased, but the DBH growth increased all the time as the pruning intensity increased. （2） Pruning would reduce the total nitrogen contents in the soil, but didn＇t had significant effects on the total nitrogen, total phosphorus, available phosphorus and potassium contents （p〉0.05）. （3）Pruning didn＇t had significant effects on the nutrients of different soil depths （p 〉0.05）, but the total nitrogen, total phosphorus and available phosphorus contents decreased gradually with soil depth, while the potassium, calcium and magnesium contents were basically the same. At the same pruning intensity, the various nutrient contents in different directions were basically the same with the exception of the calcium content which reached a maximum in every direction with light pruning. （4）The total nitrogen content of roots was the highest among all the organs. At the three pruning intensities, the total nitrogen content of the branches reduced with age and that of the roots increased. Pruning had significant effects on the total nitrogen content of the upper branches （p〈0.05）. The pruning intensity had significant effects on the total nitrogen content of the medium branches and roots with diameter exceeding 5 mm（p〈0.05）. Pruning didn＇t had significant effects on the total phosphorus content of various poplar organs（p〉0.05）. Except that the calcium contents in medium branches had significant differences between the light and intensive pruning（p〈0.05）, pruning didn＇t had significant effects on the plant potassium, calcium and magnesium contents （p〉0.05）, but they tended to decrease with the growth of branches while having no significant changes with the growth of roots.