DRY MATTER PRODUCTION OF BAHIA GRASS AS AFFECTED BY LIME, PHOSPHORUS AND ZINC RATE

Ciência Rural

Santos, Danilo Rheinheimer dos²  Pessoa, Antônio Carlos dos Santos³  Cassol, Luís César¹  Kaminski, João⁴ 

[1] UFRGS, Porto Alegre;UDESC, Lages;UFSM, Santa Maria;UFSM

关键词: bahia grass;    liming bahia grass;    liming;    phosphorus and zinc;   

DOI  :  10.1590/S0103-84781994000100008

学科分类：农业科学（综合）

来源: Universidade Federal de Santa Maria * Centro de Ciencias Rurais

【 摘 要 】

This work aimed to evaluate the lime, phosphorus and zinc effect on bahia grass (Paspalurn notatum Flugge var. saurae) dry matter. A greenhouse experiment was carried out using 2.5L pots with 3kg of sandy loam soil sample (Red yellow Podzolic - Paleudalf), in a factorial experimental design (3 x 3 x 2): two rates of lime (to reach pH 4.5 and 6.5), three zinc rates (0; 4 and 20ppm) and three phosphate rates (0; 30 and 150ppm P2O5). The dry matter production decreased when pH was raised to 6.5 for zero and 30ppm P2O5 rates. For zero ppm P2O5 ali seediings died and for 150 there were no differences in dry matter as compared to pH 4.5. The bahia grass dry matter production and phosphorus uptake for pH 4.5 treatament aiso decreased with zinc use when the rates of P2O5 was zero and 30ppm. This depressivo effect was anulated by the use of lime to reach soil pH 6.5 or 150ppm of P2O5 The zinc critical level for bahia grass was between 12 and 20ppm.

【 授权许可】

CC BY-NC