Arid
DOI10.1016/j.fcr.2009.06.001
Physiological determinants of maize and sunflower grain yield as affected by nitrogen supply
Massignam, A. M.1,3; Chapman, S. C.2; Hammer, G. L.3; Fukai, S.3
通讯作者Massignam, A. M.
来源期刊FIELD CROPS RESEARCH
ISSN0378-4290
EISSN1872-6852
出版年2009
卷号113期号:3页码:256-267
英文摘要

Utilisation of nitrogen (N) has been closely related to increases in crop productivity. However, not all crops respond similarly and the objective of this study is to identify physiological processes that determine responses to N supply for maize and sunflower. Grain yield in maize (range: 210-1255 g m(-2)) was greater and more responsive to N supply than in sunflower (1106-555 g m(-2) in carbohydrate equivalents) over a wide range of total N uptake (3->20 g N m(-2)). In maize, differences in grain yield among levels of N supply were associated more with variation in biomass than in harvest index. in sunflower, differences in grain yield (in carbohydrate equivalents) among levels of N supply were related similarly to variation in both biomass and harvest index. The decrease in biomass production with decreasing N supply was associated with decreases in both radiation interception and radiation use efficiency (RUE). Decreased interception was due to effects of N supply on reducing canopy leaf area, whereas the reduced RUE was associated with decreased SLN. Total biomass production in maize was more responsive to N supply than in sunflower. The major determinants of the differences in response of biomass accumulation to N supply found between maize and sunflower are: (i) sunflower tends to maintain SLN with increase in partitioning of N to leaves under N limitation whereas maize tends to maintain leaf area with increase in partitioning of biomass to leaves and (ii) the ability of maize to maintain N uptake following cessation of leaf production. (C) 2009 Elsevier B.V. All rights reserved.


英文关键词Grain yield Biomass Radiation intercepted Nitrogen uptake Radiation use efficiency
类型Article
语种英语
国家Brazil ; Australia
收录类别SCI-E
WOS记录号WOS:000269194000008
WOS关键词RADIATION-USE EFFICIENCY ; ARID TROPICAL ENVIRONMENT ; LEAF NITROGEN ; BIOMASS ACCUMULATION ; COMPARATIVE PRODUCTIVITY ; GROWTH ; SORGHUM ; PHOTOSYNTHESIS ; POPULATION
WOS类目Agronomy
WOS研究方向Agriculture
来源机构Commonwealth Scientific and Industrial Research Organisation
资源类型期刊论文
条目标识符http://119.78.100.177/qdio/handle/2XILL650/160633
作者单位1.Epagri Ciram, Florianopolis, SC, Brazil;
2.CSIRO Plant Ind, Queensland Biosci Precinct, St Lucia, Qld 4067, Australia;
3.Univ Queensland, Sch Land Crop & Food Sci, St Lucia, Qld 4067, Australia
推荐引用方式
GB/T 7714
Massignam, A. M.,Chapman, S. C.,Hammer, G. L.,et al. Physiological determinants of maize and sunflower grain yield as affected by nitrogen supply[J]. Commonwealth Scientific and Industrial Research Organisation,2009,113(3):256-267.
APA Massignam, A. M.,Chapman, S. C.,Hammer, G. L.,&Fukai, S..(2009).Physiological determinants of maize and sunflower grain yield as affected by nitrogen supply.FIELD CROPS RESEARCH,113(3),256-267.
MLA Massignam, A. M.,et al."Physiological determinants of maize and sunflower grain yield as affected by nitrogen supply".FIELD CROPS RESEARCH 113.3(2009):256-267.
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