Zinc, iron, manganese and copper uptake requirement in response to nitrogen supply and the increased grain yield of summer maize.
Zinc, iron, manganese and copper uptake requirement in response to nitrogen supply and the increased grain yield of summer maize.
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DOI：
10.1371/journal.pone.0093895
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发表时间：
2014
期刊：
影响因子：
3.7
通讯作者：
Zou C
中科院分区：
文献类型：
--
作者：
Xue Y;Yue S;Zhang W;Liu D;Cui Z;Chen X;Ye Y;Zou C
通过研究玉米（Zea mays L.）籽粒产量与锌（Zn）、铁（Fe）、锰（Mn）和铜（Cu）等微量元素在植株内积累的倒数效率（RIEs，每Mg籽粒对植物干物质的微量元素需要量g）之间的关系，探讨了它们与籽粒产量之间的关系。2008 ~ 2011年，在华北地区进行了不同产量和氮素水平下水稻不同生育期和地上部微量元素积累动态的田间试验。铁、锰和铜的平均含量分别为64.4、18.1和5.3 g，受产量和氮素水平的影响较小。ZnRIE随施氮量的增加而增加15%，但随产量的增加而从36.3 g下降到18.0 g。品种对ZnRIE的影响与产量范围的影响相似。ZnRIE的大幅下降可能是由于锌收获指数增加（从41%增加到60%），秸秆和籽粒锌浓度下降（从16.9 mg kg - 1下降到12.2 mg kg - 1），而不是由于茎部锌积累增加。成熟期地上部铁、锰、铜积累有增加的趋势，而吐丝前地上部铁、铜、锌积累比例持续下降（分别从95%降至59%、90%降至71%、91%降至66%）。这表明随着产量的增加，繁殖期对铁、锌和铜的需求量增大。与不施氮或低施氮相比，优化施氮可获得最高产量，并有增加籽粒微量元素浓度的趋势。过量施氮未引起茎部和籽粒产量或微量元素营养的增加。上述结果表明，优化氮素管理可能是提高玉米籽粒微量元素浓度的一种经济有效的方法。
The relationships between grain yields and whole-plant accumulation of micronutrients such as zinc (Zn), iron (Fe), manganese (Mn) and copper (Cu) in maize (Zea mays L.) were investigated by studying their reciprocal internal efficiencies (RIEs, g of micronutrient requirement in plant dry matter per Mg of grain). Field experiments were conducted from 2008 to 2011 in North China to evaluate RIEs and shoot micronutrient accumulation dynamics during different growth stages under different yield and nitrogen (N) levels. Fe, Mn and Cu RIEs (average 64.4, 18.1and 5.3 g, respectively) were less affected by the yield and N levels. ZnRIE increased by 15% with an increased N supply but decreased from 36.3 to 18.0 g with increasing yield. The effect of cultivars on ZnRIE was similar to that of yield ranges. The substantial decrease in ZnRIE may be attributed to an increased Zn harvest index (from 41% to 60%) and decreased Zn concentrations in straw (a 56% decrease) and grain (decreased from 16.9 to 12.2 mg kg−1) rather than greater shoot Zn accumulation. Shoot Fe, Mn and Cu accumulation at maturity tended to increase but the proportions of pre-silking shoot Fe, Cu and Zn accumulation consistently decreased (from 95% to 59%, 90% to 71% and 91% to 66%, respectively). The decrease indicated the high reproductive-stage demands for Fe, Zn and Cu with the increasing yields. Optimized N supply achieved the highest yield and tended to increase grain concentrations of micronutrients compared to no or lower N supply. Excessive N supply did not result in any increases in yield or micronutrient nutrition for shoot or grain. These results indicate that optimized N management may be an economical method of improving micronutrient concentrations in maize grain with higher grain yield.
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DOI：
10.1073/pnas.1101419108
发表时间：
2011-04-19
影响因子：
11.1
作者：
Chen, Xin-Ping;Cui, Zhen-Ling;Zhang, Fu-Suo
通讯作者：
Zhang, Fu-Suo
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DOI：
10.1073/pnas.0813417106
发表时间：
2009-03-03
影响因子：
11.1
作者：
Ju, Xiao-Tang;Xing, Guang-Xi;Zhang, Fu-Suo
通讯作者：
Zhang, Fu-Suo
影响因子：
2.1
作者：
KARLEN, DL;FLANNERY, RL;SADLER, EJ
通讯作者：
SADLER, EJ
影响因子：
56.9
作者：
Guo, J. H.;Liu, X. J.;Zhang, F. S.
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影响因子：
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作者：
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