不同水肥处理对红花根际化学计量特征的影响  

Effects of Different Fertilization Systems on Rhizosphere Microbe Ecological Stoichiometry Characteristic of Carthamus tinctorius L. in Xinjiang

作　　者：郭欢[1] 刘斌[1] 马晓丽[1] 张霞[1] 

机构地区：[1]石河子大学生命科学学院,新疆石河子832000

出　　处：《北方园艺》2013年第16期202-207,共6页Northern Horticulture

基　　金：国家自然科学基金资助项目(31160410);国家重点基础研究"973"发展计划资助项目(2009CB825103);人社部留学人员科技活动择优资助项目(2011LX005)

摘　　要：在田间试验条件下,以水肥耦合为中心,以新疆红花为试材,采用熏蒸提取法检测红花根际微生物生物量,采用4因素3水平二次回归正交旋转组合设计,研究了施氮量、施磷量、施钾量和供水量4个因素对红花根际微生物生态化学计量特征的影响。结果表明:施肥可以明显提高红花根际微生物生物量C、N、P含量,改变化学计量比,合理的水肥配施有利于土壤养分的提高。不同处理红花根际土壤微生物生物量C、N含量随红花的生长期延长均表现出升降升的趋势,P含量则逐渐下降。施N量对生物量C、N含量及C∶N∶P影响最显著,施P量对生物量P含量及C∶P、N∶P影响显著,供水量则对生物量C、N、P含量都有显著影响,而对K肥的影响较弱。Taking Carthamus tinctorius L.in Xinjiang as material,a field experiment was conducted to detect the microbial metabolic biomass using fumigation extraction method with water-fertilizer coupling as center.The effects of 4 factors（N,P,K and water amount） on rhizosphere microbe ecological stoichiometry characteristic of C.tinctorius L.in Xinjiang were studied using four factors and three levels quadratic regression orthogonal rotation design.The results showed that fertilization could increase the soil microbial metabolic biomass carbon（C）,nitrogen（N） and phosphorus（P） contents significantly,and change the ecological stoichiometry ratio.Reasonable fertilization system was benefit to improve soil nutrients.Soil microbial metabolic biomass C and N showed the tendency of ＂up down and up＂ with the growth stage prolonged,and P content decreased.The dosage of N fertilizer had significantly effect on C,N concentrations and C∶N∶P;the dosage of P fertilizer had significantly effect on C∶P and N∶P;the dosage of water had significantly effect on C,N and P concentrations;the dosage of K fertilizer did not response.

关 键 词：水肥处理 红花 根际微生物 生态化学计量特征 

分 类 号：S154.36[农业科学—土壤学]