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| 南岭山区杉木大径材林针叶矿质营养诊断 |
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邓厚银,王润辉,晏姝,郑会全,韦如萍,胡德活,梁机,黄章平,丘英华,邱智雄,彭华贵,曾庆团,周志平
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广东省森林培育与保护利用重点实验室,广东省森林培育与保护利用重点实验室,广东省森林培育与保护利用重点实验室,广东省森林培育与保护利用重点实验室,广东省森林培育与保护利用重点实验室,广东省森林培育与保护利用重点实验室,广西大学林学院,韶关市国有韶关林场,韶关市国有韶关林场,韶关市国有韶关林场,广东省天井山林场,广东省天井山林场,广东省天井山林场
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| 摘要: |
| 以广东省韶关林场和天井山林场的杉木大径材林针叶为试验材料，对N、P、K、Ca、Mg 矿质营养元素含量进行测定分析，以期为杉木大径材培育平衡施肥提供理论依据。结果表明：杉木中龄林矿质营养元素含量高低顺序为K>N>Ca>P>Mg，近熟林的为N>K>Ca>P>Mg；杉木中龄林、近熟林针叶矿质营养元素含量在不同坡位间存在一定程度的差异的排序；杉木中龄林针叶矿质营养元素含量变异系数范围为8.64%~44.76%，而近熟林针叶矿质营养元素含量变异系数变化范围为8.44%~26.36%。相关分析结果表明，杉木中龄林生长性状与各矿质营养元素含量分别有不同程度正相关，其中胸径、树高、材积与N 含量均呈显著或极显著正相关，而近熟林与矿质营养元素含量的相关性有所不同，其中胸径与P、Ca 含量间为显著正相关，但高生长与N、K 含量极显著负相关。运用主成分分析法对不同龄林、不同坡位的杉木针叶矿质营养元素进行综合评价，结果表明N、K 含量对杉木生长起关键作用。 |
| 关键词: 杉木 大径材 针叶 矿质营养 诊断 主成分分析 |
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| 基金项目:国家重点研发计划项目课题（2016YFD0600301）资助。 |
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| Mineral Nutrition Diagnosis of Needles in Large-timber of Cunninghamia lanceolate in Nanling Mountains |
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Deng Houyin.,Wang Runhui,Yan Shu,Zheng Huiquan,Wei Ruping,Hu Dehuo,Liang Ji,Huang Zhangping,Qiu Yinghua,Qiu Zhixiong,Peng Huagui,Zeng Qingtuan and Zhou Zhiping
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Guangdong Provincial Key Laboratory of silviculture,Protection and Utilization,Guangdong Academy of Forest,Guangdong Guangzhou,Guangdong Provincial Key Laboratory of silviculture,Protection and Utilization,Guangdong Academy of Forest,Guangdong Guangzhou,Guangdong Provincial Key Laboratory of silviculture,Protection and Utilization,Guangdong Academy of Forest,Guangdong Guangzhou,Guangdong Provincial Key Laboratory of silviculture,Protection and Utilization,Guangdong Academy of Forest,Guangdong Guangzhou,Guangdong Provincial Key Laboratory of silviculture,Protection and Utilization,Guangdong Academy of Forest,Guangdong Guangzhou,Guangdong Provincial Key Laboratory of silviculture,Protection and Utilization,Guangdong Academy of Forest,Guangdong Guangzhou,Forest college of Guangxi University,Shaoguan state-owned Forest Farm,Guangdong Shaoguan,Shaoguan state-owned Forest Farm,Guangdong Shaoguan,Shaoguan state-owned Forest Farm,Guangdong Shaoguan,Guangdong Tianjingshan Forest Farm,Guangdong Shaoguang,Guangdong Tianjingshan Forest Farm,Guangdong Shaoguang,Guangdong Tianjingshan Forest Farm,Guangdong Shaoguang
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| Abstract: |
| This study aimed to quantify needle nitrogen (N), phosphorus (P), potassium (K), calcium (Ca) and magnesium (Mg) content of the large diameter trees of two Chinese fir (Cunninghamia lanceolate )plantations in Shaoguan forest farm and Tianjing mountain forest farm of Guangdong, thereby providing theoretical basis for the balanced fertilization application. The results showed that the order of the mineral nutrient elements content in middle age forest and near mature forest were K>N>Ca>P>Mg, and N>K>Ca>P>Mg, respectively. The contents of mineral nutrients in different grades of Chinese fir middle aged and near mature forests seemed to be different with each other in grades. The range of coefficient of variation of the mineral nutrient element content in the middle age forest and near mature forest were 8.64%~44.76%, and 8.44%~26.36%, respectively. The results of correlation analysis showed that the growth traits (DBH, treeheight, volume) of middle-aged Chinese fir forest were positively correlated with the Ncontent at significantly or extremely significantly level. The correlation between near-mature forest and mineral nutrient content was different, among which there have a positive relationship between DBH and P and Ca, while a significantly negative relationship was found for tree height with N、K. Principal component analysis was used to evaluate the mineral nutrients in conifers of Chinese fir at different ages and slopes. The results showed that N and K contents played a key role in the growth of Chinese fir. |
| Key words: Cunninghamia lanceolata large-timber needles mineralnutrition diagnosis principal component analysis |
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