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Soil and Fertilizer Sciences in China
2017
(6)
122-126
不同铵硝配比下不同硅效应水稻的硅吸收动力学特征
作 者：
张合心;黄承和;常春荣
关键词：
硅高效水稻;铵硝配比;硅吸收动力学
摘 要：
将水稻移植到0.2 mmol/L Ca SO4溶液中饥饿2 d,采用改进耗竭法研究了3种铵硝配比条件下3个不同硅效应水稻(耐低硅的硅高效水稻特优998和不耐低硅的硅高效水稻特优248以及硅不敏感水稻博Ⅱ优15)硅吸收动力学特征。结果表明:作图法和双倒数法动力学方程准确性高,达到极显著水平;不同铵硝配比条件水稻硅吸收动力学曲线均符合Michaelis-Menten酶动力学模型的描述;铵硝配比对不同的硅效应水稻的硅载体数量影响不显著,显著影响水稻对硅的亲和力。本实验条件下铵硝配比50/50有利于水稻特优248对硅的吸收,铵硝比75/25时吸收速率最低;特优998对硅有较高的亲和力,可能是其耐低硅高效的遗传性差别。
译 名：
Characteristic of silicon uptake kinetic with different ratio of ammonium and nitrate in different silicon-efficiency rice
作 者：
ZHANG He-xin;HUANG Cheng-he;CHANG Chun-rong;College of Agriculture,Hainan University;
单 位：
College of Agriculture,Hainan University
关键词：
high silicon-efficiency rice;;ratio of ammonium and nitrate;;silicon uptake kinetic
摘 要：
Characteristics of silicon uptake kinetic in solution of three ratios of ammonium and nitrate were studied by modified depleting way with three different silicon-efficiency rice(Teyou 998: enduring variety to silicon deficiency,Teyou 248: nonenduring variety to silicon deficiency,and Bo Ⅱ you 15: nonsensitivity variety to silicon deficiency) treated in 0. 2 mmol/L Ca SO4 solution two days before being determined. The results showed that Mapping and Lineweaver-Burke(LB) had high veracity with 1% significant level. Silicon uptake kinetic characteristics of all treatments with three ratio of ammonium and nitrate followed the enzyme kinetic model of Michaelis-Menten. Effect of carrier quantity had no distinct difference through three ratio of ammonium and nitrate,but Kmor silicon affinity reached significant difference at 5% significant level. In this experimental condition,Teyou 248 had higher silicon uptake rate only at 50/50 ammonium to nitrate,and had the lowest uptake rate at75/25 ratio,Teyou 998 had higher silicon affinity at the same condition and that may be caused by genetic essential.
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