Nutrient Uptake, Partitioning, and Remobilization in Modern, Transgenic Insect-Protected Maize Hybrids
By R. Bender, J. Haegele, M. Ruffo, F. Below. 2013
373 citations recorded by the source corpus.
Modern maize (Zea mays L.) hybrids coupled with improved agronomic practices may have infl uenced the accumulation and partitioning of nutrient uptake since the last comprehensive studies were published. Th e 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 P 2 O 5 , 202 kg K 2 O, 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), P 2 O 5 (2.4 kg), K 2 O (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). Th e majority of total uptake occurred post-fl owering for P, S, Zn, and Cu. Harvest index values of P (79%), S (57%), Zn (62%), and N (58%) were identifi ed in the grain. Th ese results provide much needed data on the nutrient uptake and partitioning of current hybrids, and provide an opportunity to further refi ne fertilizer method and timing recommendations for maize biomass and grain production.
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Citations in the corpus
- Nutrient Uptake, Partitioning, and Remobilization in Modern Soybean Varieties (2015, methodology): “Nutrient accumulation in soybean is largely influenced by dry weight accumulation (Hanway and Weber, 1971a), and despite lower seed yield, total uptake of key nutrients in soybean may exceed a high yielding maize crop (Flannery, 1986; Bender et al., 2013).”
- Plant biomass and nitrogen partitioning changes between silking and maturity in newer versus older maize hybrids (2015, result): “Both years indicated a dominant influence of PostDM on GY, which also documented in previous studies (Karlen et al., 1988; Bender et al., 2013; Ning et al., 2013).”