Title

河北豐寧壩上孤石牧場土壤種子庫與地上植被的關係

Translated Titles

Relationship between the Soil Seed Banks and Vegetation in Gushi Pasture, Bashang, Fengning, Hebei Province

Authors

劉建立(Jian-Li Liu);袁玉欣(Yu-Xin Yuan);彭偉秀(Wei-Xiu Peng);馬長明(Chang-Ming Ma);管偉(Wei Guan)

Key Words

孤石牧場 ; 地表植被 ; 土壤種子庫 ; 組成 ; 河北 ; Gushi Pasture ; vegetation ; soil seed bank ; composition

PublicationName

乾旱區研究

Volume or Term/Year and Month of Publication

22卷3期(2005 / 09 / 01)

Page #

295 - 300

Content Language

簡體中文

Chinese Abstract

通過研究孤石牧場退耕地和非退耕地地上植被與種子庫的變化特徵,結果表明:(1)退耕地地上植被與土壤種子庫物種多樣性高於非退耕地,從地上植被和種子庫組成分析得出,退耕地正處於一年生草本植物向多年生草本植物恢復演替階段;(2)退耕地地上植被與土壤種子庫的物種豐富度(25,20)及數量(2970,593)大於非退耕地地上植被與土壤種子庫的豐富度(16,17)和數量(1806,120);(3)地上植被與土壤種子庫共有種數在退耕地上較多(8種),在非退耕地上較少(3種),從而導致了地上植被與土壤種子庫群落組成之間的相異性增大。

English Abstract

The experimental area is located in the Gushi Pasture on the Bashang Plateau, Fengning Manchu Autonomous County, Hebei Province, and its elevation varies in a range of 1000~1600m a. s. 1. It belongs to the semiarid continental monsoon climate, it is windy with less precipitation in spring, and the annual days of occurring strong winds over force 6 are 50 days. The annual temperature and the monthly temperatures in January and July are 0.8℃, -18.8℃ and 17.5℃ respectively; the annual precipitation varies in a range of 350~450mm, and the precipitation occurs mainly in July, August and September, which occupies 79% of the annual one, however, the annual evaporation is 4 times of annual precipitation. In this paper, the characteristics of change of the vegetation and soil seed banks in the lands withdrawn from farming and the farmlands in Gushi Pasture are studied. The results are as follows: (1) Species diversity of vegetation and soil seed banks in the lands withdrawn from farming is higher than that in farmlands, and the analyzed results of vegetation and soil seed banks reveal that the lands withdrawn from farming are currently in restoring succession stage from annual herbs to perennial herbs; (2) Richness indexes of the species of vegetation and of the soil seed banks (25 and 20) and their quantities (2970 and 593) in the lands withdrawn from farming are higher than that of vegetation and of the soil seed banks (16 and 17) and their quantities (1086 and 120) in the farmlands; (3) The quantity of co-occurring species (8 species ) in the lands withdrawn from farming are higher than that (3 species) in farmlands, thus, the difference of the community composition between the vegetations and soil seed banks in the lands withdrawn from farming and the farmlands becomes high.

Topic Category 基礎與應用科學 > 地球科學與地質學
生物農學 > 生物科學
生物農學 > 農業
生物農學 > 生物環境與多樣性