Late nitrogen fertilization affects nitrogen remobilization in wheat

被引:21
作者
Fuertes-Mendizabal, Teresa [1 ]
Gonzalez-Murua, Carmen [1 ]
Gonzalez-Moro, Ma B. [1 ]
Estavillo, Jose M. [1 ]
机构
[1] Univ Basque Country, Dpto Biol Vegetal & Ecol, Bilbao 48080, Spain
关键词
grain-filling period; N balance; source-sink relations; Triticum aestivum; WINTER-WHEAT; GLUTAMINE-SYNTHETASE; BREADMAKING QUALITY; SPRING WHEAT; FLAG LEAF; GRAIN; PLANT; ACCUMULATION; PROTEIN; GROWTH;
D O I
10.1002/jpln.201000299
中图分类号
S3 [农学(农艺学)];
学科分类号
0901 ;
摘要
A pot experiment with wheat plants was carried out to study how late application of nitrogen (N) fertilizer affects the use of pre-anthesis N reserves during the grain-filling period. Increasing doses of N fertilizer were applied (0, 40, and 52 mg N plant1), either in two amendments (growth stages GS20 and GS30, according to Zadoks scale) or in three amendments (GS20, GS30, and GS37). The experiment was arranged in a complete randomized three-block design with 129 plants per treatment. The plants were watered daily, harvested every 2 d between anthesis and maturity, and were separated into roots, leaf sheaths, leaf blades, and ears for further N determination. Grain N concentration improved due to a late N application in GS37 by 14% (higher N dose) and by 7% (further splitting the same N-fertilizer dose, respectively). The higher the N-fertilizer dose applied, the greater was the amount of pre-anthesis reserves in vegetative organs, these reserves became later available for remobilization. Although splitting the same N dose in three amendments did not increase the N reserves, these reserves were more efficiently remobilized allowing an improvement in grain N concentration. The fertilizer management did not change the temporary pattern of N accumulation in the ear, but did induce a change in the amount of N remobilized and in the contribution of each organ (root, leaf sheath, leaf blade) to this remobilization. Late N amendment allowed a greater N availability of leaf blades and ear N reserves (from 20% up to 26% and from 19% up to 22%, respectively) for remobilization towards the grain, decreasing the root contribution from 28% down to 15%, while the contribution of leaf sheaths was maintained around 35% irrespective of the N applied.
引用
收藏
页码:115 / 124
页数:10
相关论文
共 44 条
[31]  
2-W
[32]   Is nitrogen uptake after anthesis in wheat regulated by sink size? [J].
Mi, GH ;
Tang, L ;
Zhang, FS ;
Zhang, JH .
FIELD CROPS RESEARCH, 2000, 68 (03) :183-190
[33]   Allocation of nitrogen to cell walls decreases photosynthetic nitrogen-use efficiency [J].
Onoda, Y ;
Hikosaka, K ;
Hirose, T .
FUNCTIONAL ECOLOGY, 2004, 18 (03) :419-425
[34]   Transport of recently assimilated N-15 nitrogen to individual spikelets in spring wheat grown in culture solution [J].
Oscarson, P .
ANNALS OF BOTANY, 1996, 78 (04) :479-488
[35]   The strategy of the wheat plant in acclimating growth and grain production to nitrogen availability [J].
Oscarson, P .
JOURNAL OF EXPERIMENTAL BOTANY, 2000, 51 (352) :1921-1929
[36]   Drought affects the fluxes of carbon to roots and soil in C-13 pulse-labelled plants of wheat [J].
Palta, JA ;
Gregory, PJ .
SOIL BIOLOGY & BIOCHEMISTRY, 1997, 29 (9-10) :1395-1403
[37]   CULTIVAR DIFFERENCES IN THE RATE OF NITRATE UPTAKE BY INTACT WHEAT PLANTS AS RELATED TO GROWTH-RATE [J].
RODGERS, CO ;
BARNEIX, AJ .
PHYSIOLOGIA PLANTARUM, 1988, 72 (01) :121-126
[38]   NITROGEN REDISTRIBUTION DURING GRAIN-GROWTH IN WHEAT (TRITICUM-AESTIVUM L) .4. DEVELOPMENT OF A QUANTITATIVE MODEL OF THE TRANSLOCATION OF NITROGEN TO THE GRAIN [J].
SIMPSON, RJ ;
LAMBERS, H ;
DALLING, MJ .
PLANT PHYSIOLOGY, 1983, 71 (01) :7-14
[39]  
Sun ZhenYuan Sun ZhenYuan, 1996, Acta Phytophysiologica Sinica, V22, P258
[40]  
Tahmasebi Sarvestani Z., 2003, Journal of Agricultural Science and Technology, V5, P21