Dry matter yield, thermal sum and base temperatures in irrigated tropical forage plants

被引：20

作者：

da Silva, Edilane Aparecida ^{[1
,3
]}

da Silva, Wilson Jesus ^{[2
]}

Barreto, Antonio Carlos ^{[4
]}

de Oliveira Junior, Antonio Barbosa ^{[5
]}

Valente Paes, Jose Mauro ^{[1
,3
]}

Mendes Ruas, Jose Reinaldo ^{[1
,6
]}

Queiroz, Domingos Savio ^{[1
]}

机构：

[1] EPAMIG, Belo Horizonte, MG, Brazil

[2] EMBRAPA EPAMIG, Emater, MG, Brazil

[3] FAPEMIG, Belo Horizonte, MG, Brazil

[4] Inst Fed Triangulo Mineiro, Uberaba, MG, Brazil

[5] UNIUBE, Curso Engn Ambiental, Uberlandia, MG, Brazil

[6] CNPq, Brasilia, DF, Brazil

来源：

REVISTA BRASILEIRA DE ZOOTECNIA-BRAZILIAN JOURNAL OF ANIMAL SCIENCE | 2012年 / 41卷 / 03期

关键词：

degree-days; relative development; seasonality production; seasonality; threshold temperature; vegetation dynamics; GRASS PASTURE;

D O I：

10.1590/S1516-35982012000300014

中图分类号：

S8 [畜牧、动物医学、狩猎、蚕、蜂];

学科分类号：

0905 ;

摘要：

The present study aimed to estimate the basal temperature and thermal sum for the following tropical forage plants: Brachiaria decumbens, cultivar Basilisk; Brachiaria brizantha, cultivar Marandu; Brachiaria brizantha, cultivar Xaraes; Panicum maximum, cultivar Mombaca; Panicum maximum, cultivar Tanzania; and Cynodon spp, cultivar Tifton 85, in ten cutting seasons, under irrigation. The climatic data were collected in an automatic weather ministration installed in the experimental area and used for irrigation management. The relative development or regression equation method was used to calculate the basal temperature. The estimated basal temperature values were 15.4; 10.5; 14.2; 13.4; 12.4 and 15.1 degrees C and the demands were of 2,088.1; 3,542.5; 2,486.5; 2,838.5; 2,701.7 and 2,134.5 degree days for cultivars Basilisk, Marandu, Mombaca, Tanzania, Xaraes and Tifton 85, respectively. The relative development method revealed linearity between plant development and room temperature. Basal temperature can help elaborate climatic zoning for forage species in Brazil and allow the selection of the best suited species for each region in Brazil.

引用

页码：574 / 582

页数：9

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