不同基因型冬小麦对氮肥与锌铁肥配施的反应

以10种不同基因型冬小麦为材料,采用田间再裂区设计,研究了不同氮肥用量(0,105 kg N/hm2)与锌铁用量(Zn:0,6.8 kg/hm2;Fe:0,12.1 kg/hm2)对冬小麦幼苗(返青期)生长及锌铁吸收的影响.结果表明,施氮对10种基因型冬小麦的生物量、分蘖数和叶绿素SPAD值均有显著影响,增幅分别达到15.8%,14.7%,4.6%;施用锌铁肥后生物量增加8.0%,但分蘖数减少5.8%,而对叶绿素SPAD值几乎无影响;10种不同基因型小麦植株的长势有较大差异.施用氮肥后,显著提高了各基因型小麦植株的锌含量与锌携出量,平均提高7.6%和22.9%,而小麦植株铁的含量降低6.4%,但携出量提高7.2%;施用锌铁肥显著增加了小麦的锌含量和携出量,增幅分别11.9%和19.2%,但对铁的含量和携出量影响不显著.10种不同基因型小麦植株锌铁携出量存在一定差异,吸收值较高的三种基因型分别为绵阳31、陕优225、陕优253.

Response of different genotypes of winter wheat on combination application of nitrogen and zinc iron fertilizers

In this study,a field experiment with split-split design was conducted using 10 winter wheat genotypes to investigate the effects of combination of nitrogen,zinc and iron fertilizers on growth,and zinc and iron uptake by seedling plants during the reviving stage of winter wheat.Nitrogen rates(0,105 kg N/hm2) and different rates of Zn,Fe fertilizers(0,6.8 kg Zn/hm2;0,12.1 kg Fe/hm2) were adopted.The results showed that nitrogen fertilization significantly influenced on seedling yield,number of tillers and chlorophyll SPAD value of 10 types of wheat genotypes,and they were increased by 15.8%,14.7%,4.6%,respectively.Application of zinc and iron fertilizers also significantly influenced on seedling yield,number of tillers,but almost did not impose on chlorophyll SPAD value;the seedling yield increased by 8.0%,but the number of tillers decreased 5.8%;the growth status of different genotypes of wheat showed large variation.The nitrogen fertilization could greatly increase zinc concentration and uptake to all of wheat genotypes tested,and they increased by 7.6%,22.9% averagely,respectively,but the iron concentration decreased 6.4% and the iron uptake increased by 7.2%;Application of Zn,Fe fertilizers increased significantly zinc concentration and uptake by 11.9%,19.2% respectively,but there was no obvious influences on iron concentration and uptake.There existed some differences for concentration and uptake of zinc and iron among varied wheat genotypes,the largest three genotypes for uptake amount of zinc and iron were Mianyang 31,Shanyou 225 and Shanyou 253.