有机物料对平邑甜茶根系^(32)P吸收动力学参数的影响  

The Effects of Organic Materials on Absorption Dynamic Parameter of ^(32)P of M.hupehensis Rehd.Root System

作　　者：毛志泉[1] 张继祥[1] 胡艳丽[1] 张江红[2] 王丽琴[1] 束怀瑞[1] 

机构地区：[1]山东农业大学园艺学院,泰安271018 [2]河北农业大学园艺学院,保定071001

出　　处：《中国农业科学》2005年第11期2365-2371,共7页Scientia Agricultura Sinica

基　　金：山东省科技攻关项目(991154304)资助

摘　　要：研究了3种有机物料对平邑甜茶实生苗吸收根、生长根、褐色木质根磷吸收的影响。结果表明,3类根对磷的吸收均符合离子吸收动力学模型。有机物料的加入均不同程度地提高了Imax,而Km有所降低。不同处理间根系磷吸收动学力学参数有差异:在夏季各类根的Imax表现为鸡粪处理>羊粪处理>花生秧处理,秋季为羊粪处理>鸡粪处理>花生秧处理(Km值的大小顺序与之相反)。3类根的磷吸收动力学参数差异较大,吸收根其Imax是褐色木质根的7.4～8.7倍,生长根是褐色木质根的4.7～5.8倍。而褐色木质根的Km值是吸收根的1.1～1.5倍,是生长根的1.0～1.2倍。说明吸收根和生长根对磷的吸收潜力、与磷的亲和力均大于褐色木质根。夏季根系对磷的最大吸收速率与植株生物量呈极显著正相关,秋季未达到显著水平(褐色木质根除外)。The uptake of phosphorus in three different types of M. hupehensis Rehd. was affected by three kinds of organic of roots system （absorbing roots, growing roots and brown roots） materials and was in accordance with Michelis-Menten equation. Treatment with various kinds of organic materials changed the uptake kinetics parameters of j2p to different extent. The addition of organic materials increased Imax and decreased Km as compared with the control. The value of Imax of three kinds of roots was in the following orders： treatment with chicken manure 〉 sheep manure 〉 peanut straws in summer, and treatment with sheep manure〉 chicken manure 〉 peanut straws in autunm （value of Km was in the opposite order）, Imax and Km of the three types of roots were determined and it was found that lmax of absorbing roots was 7.4 to 8.7 times that of brown roots, and Imax of growing roots 4.7 to 5.8 time as large as that of brown roots. Km of brown roots was 1.1 to 1.5 times and 1.0 to 1.2 times those of absorbing roots and growing roots. This means that the potential P uptake efficiency and affinity in absorbing and growing root was greater than that of brown roots. The Imax was positively correlated with plant biomass in summer while showed no great significance in autumn.

关 键 词：平邑甜茶 有机物料 根系 ^32P 吸收动力学参数 

分 类 号：S661.1[农业科学—果树学]