不同玉米杂交种对锌素反应类型的初步研究

在两种施锌水平下,对12个玉米杂交种的产量、生物量、累积吸锌量、锌利用效率和锌响应度进行了研究。结果表明,不同玉米杂交种之间、杂交种与锌肥处理互作之间的玉米产量、生物量和累积吸锌量均达到极显著差异水平;天塔1号、天塔2号、天塔5号、天塔8号、天塔9号、天塔212和津甜1号对锌响应度为正值,其余为负值;在玉米累积吸锌量方面,除津甜1号、天塔8号、天塔7号和天塔212的低锌水平低于高锌水平外,其余均高于高锌水平;不同杂交种中,天塔8号、天塔5号、天塔2号、天塔1号和津甜1号低锌水平组的玉米产量低于高锌水平,其余高于高锌水平;天塔2号和天塔7号的锌利用效率属于双低效型,天塔5号、天塔8号、天塔212、津紫鲜糯均属于双高效型,津糯1号属于低锌高效型。

Primary Studies of Zinc Responsiveness on Different Maize Hybrids

Twelve hybrids were analyzed for maize yield, biomass, Zn accumulation, Zn use efficiency and Zn responsiveness at two kinds of Zn application levels. The results show that maize yield, biomass and Zn accumulation had significant differences among different maize hybrids, the interaction of hybrids and Zn treatment. Tianta No. 1, Tianta No.2, Tianta No.5, Tianta No.8, Tianta No.9, Tianta No.212 and Tianjin sweet No.1 showed positive values for Zn responsiveness, and the others showed negative values. Zn accumulation of Tianjin sweet No.l, Tianta No.8, Tianta No.7 and Tianta No.212 at lower Zn levels were lower than that of the higher Zn levels, and Zn accumulation of other hybrids at lower Zn levels were higher than that of the higher Zn levels. Yield of Tianta No.8, Tianta No.5, Tianta No.2, Tianta No.1 and Tianjin sweet No.1 at lower Zn levels were lower than that of the higher Zn levels, and yield of other hybrids at lower Zn levels were higher than that of the higher Zn levels. Zn use efficiency of Tianta No.2 and Tianta No.7 was double low efficiency. Tianta No.5, Tianta No.8, Tianta No.212 and Tianta purple waxy maize belonged to the kind of double high efficiency. Tianta waxy No. 1 belonged to the kind of lower Zn and high efficiency.