Productive and physiological characteristics of the submited mombaça grass the rates of potassium

Authors

  • Walcylene Lacerda Matos Pereira Scaramuzza Universidade Federal do Mato Grosso, Faculdade de Agronomia e Medicina Veterinária, Departamento de Solos e Engenharia Rural, Cuiabá, MT
  • Rosane Cláudia Rodrigues Universidade Federal do Mato Grosso, Faculdade de Agronomia e Medicina Veterinária, Departamento de Solos e Engenharia Rural, Cuiabá, MT
  • Francisco Antônio Monteiro Universidade de São Paulo, Escola Superior de Agricultura Luiz de Queiroz, Departamento de Solos e Nutrição de Plantas, Piracicaba, SP

Keywords:

leaf aerea, dry matter, Panicum maximum, tiller, SPAD

Abstract

The experiment was carried out in a greenhouse with the objective of evaluating the dry matter yield, tiller number, leaf area and chlorophyll concentration in the leaves throught SPAD readings in Panicum maximum cv. Mombaça grown in nutrient solution. The rates potassium was (0; 9.75; 39; 78; 156; 234; 312 and 468mg L-1). The was set in complete randomized block design, with four replications. Plants were harvested at 30 and 52 days after transplanting for the first and second growth periods, respectively. Plant tops were separated into lamina emerging leaves, lamina of recently expanded leaves, lamina of mature leaves and stems plus heaths. After the second harvest, roots were colleted. The increase in potassium rates in nutrient solution showed significant and positive responses on forage dry matter yield, tiller number and leaf area and these effects a second-order and first-order models according to the studied variables. The rates of potassium had not influenced the text of clorofila in no period of evaluated growth, however it affected the number of tillering significantly, being the biggest values observed in the biggest rates.

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Published

2007-03-22

Issue

Section

FORAGE CROPS AND PASTURES

How to Cite

Productive and physiological characteristics of the submited mombaça grass the rates of potassium. (2007). Bulletin of Animal Husbandry, 64(3), 213-220. http://bia.iz.sp.gov.br/index.php/bia/article/view/1226

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