文档介绍:2012-08-25
DOI: .
/
应用与环境生物学报 Chin J Appl Environ Biol 2012,18 (4): 575~581
盐碱地施用脱硫石膏对土壤养分及
油葵光合特性的影响*
邹璐1 范秀华1** 孙兆军1, 2 王娟1
(1北京林业大学理学院北京 100083)
(2宁夏大学新技术应用研究开发中心银川 750021)
摘要
通过分析宁夏平罗西大滩不同改良年份盐碱地土壤养分含量,测定油葵(Helianthus annuus)光合日变化曲
线、光响应曲线和油葵产量,研究了施用脱硫石膏对盐碱地土壤改良及油葵光合特性的影响. 结果表明,在盐碱土壤
上施用燃煤电厂脱硫石膏后,土壤电导率、pH值随土壤改良年限增加而逐年下降,土壤有机质含量、碱解氮、有效磷
和速效钾则逐年上升. 随着土壤改良年限增加,油葵叶片净光合速率、蒸腾速率、气孔导度、胞间二氧化碳浓度均明显
下降,气孔限制值和水分利用效率也明显下降(P<). 同时,随着改良年限增加,油葵叶片暗呼吸速率、光饱和点
和最大净光合速率增加,而光补偿点降低. 施用脱硫石膏后油葵盘径、百粒重和产量随土壤改良年限增加也显著提高
(P<). 因此,施用燃煤电厂脱硫石膏能够显著地改良盐碱地土壤、提高油葵叶片光合能力,从而促进作物生长、
提高作物产量. 图2 表 3 参 29
关键词脱硫石膏;盐碱地;油葵;光合特性;土壤养分
CLC :
Effects of Desulfurized Gypsum Addition on Saline-alkali Soil Nutrients and
Photosynthetic Characteristics of Cultivated Oil-sunflower*
ZOU Lu1, FAN Xiuhua1**, SUN Zhaojun1, 2 & WANG Juan1
(1Faculty of Science, Beijing Forestry University, Beijing 100083, China)
(2Research & Development Center for Application of New Technology, Ningxia University, Yinchuan 750021, China)
Abstract The soil nutrient content of the ameliorated saline-alkali soils with different ages, and the diurnal courses curve of
photosynthetic parameters, photosynthetic light response curve and yield of oil-sunflower (Helianthus annuus) grown on the
ameliorated soils were measured to investigate the effects of desulfurated waste res