Effect of Nitrogen and Trinexapac-Ethyl Rates on the SPAD Index of Wheat Leaves

被引：16

作者：

Espindula, Marcelo Curitiba ^{[1
]}

Rocha, Valterley Soares ^{[1
]}

Rezende Fontes, Paulo Cezar ^{[1
]}

Correa da Silva, Raul Carvalho ^{[1
]}

de Souza, Leandro Torres

机构：

[1] Univ Fed Vicosa, Dept Fitotecnia, BR-36570000 Vicosa, MG, Brazil

来源：

JOURNAL OF PLANT NUTRITION | 2009年 / 32卷 / 11期

关键词：

Triticum aestivum; diagnosis; chlorophyll; green; CHLORMEQUAT CHLORIDE; MEPIQUAT CHLORIDE; GROWTH; CULTIVARS;

D O I：

10.1080/01904160903245113

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The objective of this studywas to evaluate the effect of nitrogen (N) and trinexapac-ethyl (TE) rates on the SPAD index in wheat flag leaf. The treatments were five N rates (30, 60, 90, 120, 150 kg ha(-1)) combined with four TE rates (0, 63, 125, 188 g ha(-1)). The experiment was carried out in a randomized block design with four repetitions. SPAD index, leaf N content and grain yield showed quadratic response to the increase in N rates, whereas area, wet and dry weight of flag leaf presented linear increase. TE caused linear increase in SPAD index, linear decrease in leaf area, reduction in grain yield with smaller N rates and increase with larger N rates. The N content, and the wet and dry weight of flag leaf were not affected by TE. SPAD calibration to estimate N status in wheat should be specific for each TE rate.

引用

页码：1956 / 1964

页数：9

共 18 条

[1] Response of rice cultivars to nitrogen and growth regulator chlormequat chloride [J].

Buzetti, Salatier ;

Bazanini, Graciela Cristina ;

de Freitas, Jose Guilherme ;

Andreotti, Marcelo ;

Arf, Orivaldo ;

de Sa, Marco Eustaquio ;

Meira, Flavia de Andrade .

PESQUISA AGROPECUARIA BRASILEIRA, 2006, 41 (12) :1731-1737

[2]

Coelho M. A. O., 1998, Revista Brasileira de Ciencia do Solo, V22, P555, DOI 10.1590/S0100-06831998000300022

[3]

Embrapa, 2006, SIST BRAS CLASS SOL

[4] USE OF GROWTH RETARDANTS IN WHEAT [J].

Espindula, M. C. ;

Rocha, V. S. ;

Grossi, J. A. S. ;

Souza, M. A. ;

Souza, L. T. ;

Favarato, L. F. .

PLANTA DANINHA, 2009, 27 (02) :379-387

[5] PHOTOSYNTHESIS AND NITROGEN RELATIONSHIPS IN LEAVES OF C-3 PLANTS [J].

EVANS, JR .

OECOLOGIA, 1989, 78 (01) :9-19

[6]

Fontes PCR., 2007, ADUBACAO NITROGENADA

[7] Influence of trinexapac-ethyl on respiration of isolated wheat mitochondria [J].

Heckman, NL ;

Elthon, TE ;

Horst, GL ;

Gaussoin, RE .

CROP SCIENCE, 2002, 42 (02) :423-427

[8] Comparative study of mepiquat chloride and chlormequat chloride application in cotton [J].

Lamas, FM .

PESQUISA AGROPECUARIA BRASILEIRA, 2001, 36 (02) :265-272

[9] Predicting post-anthesis N requirements of bread wheat with a Minolta SPAD meter [J].

Lopez-Bellido, RJ ;

Shepherd, CE ;

Barraclough, PB .

EUROPEAN JOURNAL OF AGRONOMY, 2004, 20 (03) :313-320

[10] Mepiquat chloride loss by simulated rain [J].

Mateus, GP ;

Lima, ED ;

Rosolem, CA .

PESQUISA AGROPECUARIA BRASILEIRA, 2004, 39 (07) :631-636

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