CO_2施肥对黄瓜幼苗根系发育及氮代谢酶活性的影响  

Effects of CO_2 Enrichment on Root Growth and Enzyme Activities Related to Nitrogen Metabolism in Root of Cucumber Seedlings

作　　者：尹燕东[1] 魏珉[1] 邹永洲[2] 王秀峰[1] 

机构地区：[1]山东农业大学园艺科学与工程学院,山东泰安271018 [2]济南市历城区蔬菜局,山东济南250100

出　　处：《西北农业学报》2006年第5期191-194,201,共5页Acta Agriculturae Boreali-occidentalis Sinica

摘　　要：以砂培黄瓜为试材,研究了不同CO2施肥处理对幼苗根系生育和氮代谢相关酶活性的影响。结果表明,增加环境CO2浓度和延长CO2施肥时间均明显促进了黄瓜幼苗根系的发育,CO2施肥黄瓜的主根长度、总根长度、根系鲜重、根系分枝、根系活力及其吸收面积均有不同程度的增加;根系硝酸还原酶和谷氨酰胺合成酶活性增强。除氮代谢酶活性外,每天上、下午各以950±50 mmol.L-1CO2施肥3 h的效果大于仅在上午施肥。This experiment studied effects of different CO2 enrichment on growth and enzymes activi ties related to nitrogen metabolism of roots of cultured cucumber seedlings. It concluded that roots of cucumber seedlings speeded up with CO2 concentration and time added. CO2 enrichment could promote total root length, fresh weight, branching, root activity, root absorption area, nitrate reductase, glutamine synthetase activities. The effect of enrichment 950±50 mmol · L^-1 CO2 enrichment for each 3 hours a.m. and p.m. excelled that of enrichment a.m. except for enzymes related to nitrogen metabolism.

关 键 词：CO2施肥 黄瓜 根系 

分 类 号：S642.2[农业科学—蔬菜学]