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中国农学通报

中国农学通报 ›› 2012, Vol. 28 ›› Issue (1): 39-43.doi: 10.11924/j.issn.1000-6850.2011-2486

所属专题： 园艺； 农业气象

• 林学 园艺 园林 • 上一篇    下一篇

岩溶区板栗树下旱季和雨季土壤CO2浓度的研究

李光超 曹建华   

  • 收稿日期:2011-08-29 修回日期:2011-10-13 出版日期:2012-01-05 发布日期:2012-01-05

Soil CO2 Concentration under Castanea mollissima Region in Karst Areas at Dry and Rainy Seasons

  • Received:2011-08-29 Revised:2011-10-13 Online:2012-01-05 Published:2012-01-05

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摘要：

为了研究岩溶区种植板栗树以后土壤CO2浓度的变化，以广西隆安县岩溶区板栗树下和相同地质条件下非板栗树下（草地）为研究对象，分别测定了旱季与雨季时10 cm、20 cm、40 cm、60 cm、80 cm的土壤pH和CO2浓度等，并且做了比较分析。结果表明：在相同的条件下板栗树下的土壤pH比非板栗树下的低且显弱酸性；雨季土壤pH比旱季土壤低；板栗树下的土壤CO2浓度比非板栗树高，而雨季比旱季CO2浓度高。土壤pH与土壤CO2浓度相关性分析表明，土壤CO2的浓度与土壤的pH成显著负相关关系，土壤CO2浓度与降雨量、温度等有很大的关系。

关键词: 西藏, 西藏, 芥菜型油菜, 农艺性状, 典范相关分析

Abstract:

The purpose of the study was to research the changes of soil CO2 concentration after planting Castanea mollissima in the Karst areas, taking two kinds of lands as the research object, which were under Castanea mollissima and grassland in Karst areas of Long’an County, Guangxi, tests the pH values and CO2 concentration of the soils in corresponding depths which included 10 cm, 20 cm, 40 cm, 60 cm and 80 cm at the dry and rainy seasons; then conducts a comparison study on the soil’s CO2 concentration between them, with aim to study the change of the soil’s CO2 concentration after planting Castanea mollissima in Typical Karst area. The results showed that under the same condition, the soil’s pH value of Castanea mollissima was lower than others. Relate to rainy season and dry season, the soil pH value of rainy season was lower than dry season. Relate to the soil CO2 concentration, under the same condition, the soil CO2 concentration of Castanea mollissima was higher than others, and soil CO2 concentration of rainy season was higher than dry season. Based on the analysis of soil pH values and soil CO2 concentration, the soil CO2 concentration had significant negative correlation with soil pH. The soil CO2 concentration had significant correlation with rainfall, temperature etc.