欢迎访问林业科学,今天是

林业科学 ›› 1999, Vol. 35 ›› Issue (zk): 95-100.

• 土壤肥力监测 • 上一篇    下一篇

火炬松和湿地松幼林施肥对土壤性质和叶片养分影响*

李贻铨1,陈宏峻1,陈道东1,张瑛1,胡世才2   

  1. 1. 中国林业科学研究院林业研究所 北京 100091
    2. 江西景德镇市枫树山林场 景德镇 333000
  • 出版日期:1999-01-25 发布日期:1999-09-25

EFFECTS OF FERTILIZATION ON SOIL PROPERTIES AND FOLIAR NUTRIENTS OF YOUNG STANDS OF PINUS TAEDA AND P.ELLIOTTII

Yiquan Li1,Hongjun Chen1,Daodong Chen1,Ying Zhang1,Shicai Hu2   

  1. 1. The Research Institute of Forestry, CAF Beijing 100091
    2. Fengshushan Forest Farm of Jingdezhen, Jiangxi Province Jingdezhen 333000
  • Online:1999-01-25 Published:1999-09-25

摘要:

1991~1995年期间,在江西景德镇市低丘千枚岩和第4纪红土红壤上,研究了火炬松、湿地松幼林施肥(P和PK)对土壤性质和叶片养分的影响。结果表明:(1) 2个施肥处理使火炬松和湿地松林土壤速效P含量提高,有机质等其它土壤肥力指标下降。施P肥加速了有机质矿化和林木对N的吸收; (2) 2个施肥处理能提高湿地松林土壤细菌、真菌和纤维分解菌的数量,减少放线菌的数目,而施肥前期对好气固N菌、P细菌有促进作用,后期对其有抑制作用; (3) 2个施肥处理能明显提高湿地松林土壤脲酶和过氧化氢酶活性,施肥前期磷酸酶活性受到抑制,施肥后期磷酸酶活性不再受抑,酶活性大大提高。P肥能提高蔗糖酶活性,而PK肥对蔗糖酶活性有抑制作用; (4)湿地松林施肥2年后,叶片养分有明显变化, P和PK处理提高了叶片Ca、Mg的含量,降低了N水平,而对P和K含量影响不大。

关键词: 火炬松, 湿地松, 施肥, 土壤性质, 叶片养分

Abstract:

Effects of fertilizer application of P and PK on soil properties and foliar nutrients of young stands of loblolly pine(Pinus taeda) and slash pine (P.elliottii) were studied during 1991~1995 on the site of red earth derived from phyllite in the hilly land of Jingdezhen City of Jiangxi Province. The results showed that: (1)Rapidly available P content of soil increased while organic matter and other nutrients decreased in the soil of both stands after the fertilization of P and PK; P application could facilitate the mineralization of organic matter and the absorption of N. (2) P and PK application could increase the numbers of bacteria, fungi and cellulose-decomposing bacteria but reduce actinomyces in the soil of slash pine and stimulate aerobic nitrogen-fixing bacteria and phosphobacteria at the early stage of fertilization while inhibit at the later stage. (3) P and PK application could also improve activities of soil urease and catalase, and inhibit soil phosphatase at the early phase of fertilization but release its activity at the latter phase; sucrase activity could be improved by P application while inhibited by PK. (4) P and PK application could significantly increase Ca and Mg after two years from fertilization but reduce N content in the needle of slash pine, and there was no significant effect on P and K content in the needles.

Key words: Slash pine, Loblolly pine, Fertilization, Soil property, Foliar nutrient