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马尾松人工幼林施肥肥效与增益持续性研究

Fertilizing Effectiveness and Gain Sustainability of Pinus massoniana Young Plantation

  • 摘要: 经13a的马尾松幼林施肥试验表明,红壤地区施P肥有利于马尾松幼林生长,但产生肥效迟(施肥7a后产生显著效果),施N、K肥对促进马尾松幼林生长无显著影响,过量还会产生负效应。施N、K肥会促进林木分化,施P肥则能使林分结构均一,经偏相关分析表明,P元素是影响马尾松生长的主要因子,肥效有一定的时效性和增益持续性。施肥最佳处理组合为N1P3K2,即每公顷施N、P、K分别为0、30、30kg。

     

    Abstract: Thirteen years’test of Pinus massoniana plantation fertilization showed that fertilizing P on red soil area benefited the growth of P.massoniana young plantation, but the effect of fertilizer began appear in the seventh years after fertilizing.N and K had no significant effect on the growth of P.massoniana young plantation and negative effect would appear if overdose fertilizers were applied.N and K would promote the differentiation of forest trees while P could make the stand structure unified.The result of partial correlation analysis showed that P was the key factor affecting the growth of P.massoniana .The effectiveness of fertilizer could last for certain a period and had gain sustainability.The best combination of fertilizer was N1P3K2, i.e.the applying ratio of N, P and K fertilizers should be 0 kg:30 kg:30 kg per hectare.

     

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