大气CO_2浓度升高和氮肥施用对小麦生长期间土壤溶液阴离子含量的影响  

EFFECTS OF FREE-AIR CO_2 ENRICHMENT AND NITROGEN SUPPLY ON THE CONCENTRATION OFANION OF SOIL SOLUTION IN WHEAT FIELD

作　　者：程磊[1] 朱建国[1] 陈改苹[1] 周淼[2] 曾青[1] 谢祖彬[1] 庞静[1] 

机构地区：[1]中国科学院南京土壤研究所,南京210008 [2]南京理工大学,南京210094

出　　处：《土壤》2005年第1期80-84,共5页Soils

基　　金：国家自然科学基金项目(NSFC-40271061);国家自然科学基金重大国际合作研究项目(NSFC-40120140817);中国科学院知识创新重要方向项目(KZCX2-408)共同资助。

摘　　要：在中国稻/麦轮作 FACE(Free-Air CO2 Enrichment)平台上,采用根际土壤溶液取样器来研究大气CO2 浓度升高和不同 N 肥水平对小麦生长期间土壤溶液离子组成的影响。结果表明,高 CO2 浓度条件对土壤溶液pH 值无显著影响,但却普遍降低土壤溶液中 Cl-、NO3 和 SO4 3 种主要阴离子含量;相对于 N 150 kg/hm2 施 N - 2-水平,N 250 kg/hm2 施用量显著降低土壤溶液中 NO3 含量,同时也明显降低 Cl-和 SO4 含量。 - 2-Effects of elevated atmospheric CO2 and nitrogen supply on concentration of anion in soil solution were investigated in a FACE(Free-Air CO2 Enrichment)study. Soil solutions were extracted with the Rhizon SMS-MOM from a wheat field. Little effect of CO2 treatment on soil solution pH was observed in all cases. Elevated CO2 decreased the concentration of Cl-, NO3 and SO4 in the soil solution, but not significantly in statistics in most - 2- cases. Normal nitrogen supply not only increased the concentration of NO3 significantly but also heightened the content - of Cl- and SO4 significantly in samples regardless of gathering dates. 2-

关 键 词：CO2浓度升高 氮肥 阴离子 土壤溶液 小麦 

分 类 号：S153.5[农业科学—土壤学]