Nutrient Uptake, Partitioning, and Remobilization in Modern, Transgenic Insect-Protected Maize Hybrids
Nutrient Uptake, Partitioning, and Remobilization in Modern, Transgenic Insect-Protected Maize Hybrids
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DOI：
10.2134/agronj2012.0352
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发表时间：
2013-01-01
期刊：
影响因子：
2.1
通讯作者：
Below, Fred E.
中科院分区：
文献类型：
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作者：
Bender, Ross R.;Haegele, Jason W.;Below, Fred E.
现代玉米（Zea mays L.）自上一次综合研究发表以来，杂交种加上改良的农艺做法可能影响了养分吸收的积累和分配。本研究的目的是调查营养吸收和分配的精英商业种质与转基因昆虫保护下的现代管理措施。植物在六个生长阶段取样，并分为四个部分进行营养测定。每公顷生产23.0 Mg ha（-1）总生物量和12.0 Mg ha（-1）谷物所需的总养分包括286 kg N、114 kg P2 O 5、202 kg K2 O、59 kg Mg、26 kg S、1.4 kg Fe、0.5 kg Mn、0.5 kg Zn、0.1 kg Cu和0.08 kg B。10天的时间（V10-V14）表示干重（439 kg）、氮素（N）（8.9 kg）、P2O5（2.4 kg）、K2O（5.8 kg）、Mg（2.2 kg）、S（0.7 kg）、Zn（14.2 g）、Mn（18.0 g）、B（3.3 g）、Fe（95.3 g）和Cu（3.0 g）。大部分的总吸收发生在开花后的P，S，Zn和Cu。收获指数值的P（79%），S（57%），锌（62%），和N（58%）被确定在粮食。这些结果提供了当前杂交种养分吸收和分配方面急需的数据，并为进一步完善玉米生物量和谷物生产的施肥方法和时间建议提供了机会。
Modern maize (Zea mays L.) hybrids coupled with improved agronomic practices may have influenced the accumulation and partitioning of nutrient uptake since the last comprehensive studies were published. The objective of this study was to investigate nutrient uptake and partitioning among elite commercial germplasm with transgenic insect protection grown under modern management practices. Plants were sampled at six growth stages and divided into four fractions for nutrient determination. Total nutrients required per hectare to produce 23.0 Mg ha(-1) of total biomass with 12.0 Mg ha(-1) of grain included 286 kg N, 114 kg P2O5, 202 kg K2O, 59 kg Mg, 26 kg S, 1.4 kg Fe, 0.5 kg Mn, 0.5 kg Zn, 0.1 kg Cu, and 0.08 kg B. A 10-d period (V10-V14) denoted the maximum rates of accumulation on a per day basis for dry weight (439 kg), N (8.9 kg), P2O5 (2.4 kg), K2O (5.8 kg), Mg (2.2 kg), S (0.7 kg), Zn (14.2 g), Mn (18.0 g), B (3.3 g), Fe (95.3 g), and Cu (3.0 g). The majority of total uptake occurred post-flowering for P, S, Zn, and Cu. Harvest index values of P (79%), S (57%), Zn (62%), and N (58%) were identified in the grain. These results provide much needed data on the nutrient uptake and partitioning of current hybrids, and provide an opportunity to further refine fertilizer method and timing recommendations for maize biomass and grain production.