Morphophysiology of Corn Plants in Competition with Picao-Preto and Trapoeraba Submitted to Clearings

被引：4

作者：

Lemos, J. P. ^{[1
,2
]}

Galvao, J. C. C. ^{[2
]}

Silva, A. A. ^{[2
]}

Fontanetti, A. ^{[3
]}

Correa, M. L. P. ^{[2
]}

Cecon, P. R. ^{[2
,4
]}

机构：

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

[2] CNPq, Vicosa, MG, Brazil

[3] Univ Fed Sao Carlos, Centro Ciencias Agrarias, Dep Agron, Sao Carlos, SP, Brazil

[4] DPE UFV, Dep Estatist, Vicosa, MG, Brazil

来源：

PLANTA DANINHA | 2012年 / 30卷 / 03期

关键词：

stomatic conductance; efficient use of radiation; UFVM; 100; Nativo; WATER-USE; PHOTOSYNTHESIS; TEMPERATURE; CONDUCTANCE; ALLOCATION; GROWTH;

D O I：

10.1590/S0100-83582012000300004

中图分类号：

Q94 [植物学];

学科分类号：

071001 ;

摘要：

The efficiency of using clearings to control Picao-preto (Bidens pilosa) and Trapoeraba (Commelina benghalensis) was evaluated based on the morphological and physiological characteristics of corn. An experiment under greenhouse conditions was conducted in 2009/2010. The physiological characteristics were obtained in a subdivided parcel, with four evaluations being performed throughout the corn cycle (1- before the first clearing (V3); 2- after the first clearing (V6); 3- after the second clearing (V9); and 4- corn plants at the fluorescence stage), by means of Infra Red Gas Analyzer. Two clearings reduced the influence of B. pilosa and C. benghalensis weeds on the morphological characteristics of corn. The clearing did not influence the physiological aspects of the corn plants in competition with weeds. C. benghalensis caused a greater interference in the physiological characteristics of corn, reducing photosynthesis and transpiration. When not cleared, B. pilosa species had a greater capacity of interfering in corn morphology.

引用

页码：487 / 496

页数：10

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