欢迎访问林业科学,今天是

林业科学 ›› 1995, Vol. 31 ›› Issue (1): 72-76.

• 研究简报 • 上一篇    下一篇

马尾松球果发育和元素含量的季节动态*

张云跃,李佩瑜,简梦完   

  1. 湖南省安化县林业科学研究所, 安化 413500
  • 收稿日期:1994-02-24 出版日期:1995-01-25 发布日期:1995-01-25

SEASONAL DYNAMIC PATTERNS OF DEVELOPMENT AND NUTRIENT CONTENTS IN THE FEMALE CONES OF PINUS MASSONIANA LAMB

Yunyue Zhang,Peiyu Li,Mengwan Jian   

  1. The Forestry Resaerch Institute of Anhua County Anhua 413500
  • Received:1994-02-24 Online:1995-01-25 Published:1995-01-25

关键词: 马尾松, 球果发育, 元素含量, 季节变化

Abstract:

To determine the seasonal changes in the growth and nutrient contents of the female cone for Pinus massoniana Lamb., the growth of the female cone in length and diameter and the nutrient compositions were.determined monthly in a 25-30-year-old stand during two successive years at Anhua county, Hunan Province.The results showed that the duration from pollenation to cone mature was about 540 days.The volume and weight of the con elets increased a little during the first year, which were in a bilinear curve model.The growth in dimension and weight of the cones increasded rapidly after April of the second year, which showed a logistic curve model.The seasonal changes in the concentrations of N, P, and K in conelets showed a "V" manner.The concentrations of micronutrients, such as Fe, Zn, and Mn increased gradually from pollination period to the first winter, while the Cucontent remained at a lower level. In the second year of the cone developm ent, all of the contents of mineral elements in cones decreased gradually with the increasing of cone weights.The concentrations of macronutrients in cones from high to low were K>N>P>Ca>Mg and Mn>Fe>Zn>Cu for micromutrients.

Key words: Pinus massoniana Lamb., Development of cone, Element content, Seasonal change