Corn Yield as Affected by Liming and Tillage System on an Acid Brazilian Oxisol

Abstract

Tillage system affects many soil parameters that may influence plant growth. This study evaluated the effect of liming on corn (Zea mays L.) yield and chemical characteristics of a Humic Hapludox (clayey, kaolinitic, goethitic, termic) under both conventional tillage (CT) and no‐tillage (NT) systems. Rates of dolomitic lime, from 0 to 18 t ha−1, were plowed into the soil in 1992 in southern Brazil; our study was conducted from 1996 through 1999. Lime rate was allocated to subplots, and tillage systems to main plots, in a split‐plot design. Corn yield increased with liming in all years and was higher with CT than with NT in 2 of 3 yr. Averaged across years and systems, liming increased yield by 66%, which ranged from 4.4 to 7.8 t ha−1. The highest average yield (7.8 t ha−1) was obtained at pH 6.5; yields at pH 6.0 or 5.5 were 97 and 89% of the maximum, respectively. Liming reduced soil organic matter (SOM) in both systems, but nutrients (P, K, Ca, Mg, Fe, Cu, Zn, and Mn) remained above sufficiency on all treatments. Aluminum, pH, SOM, and other nutritional parameters did not differ between tillage systems, partly because limestone was initially incorporated in all plots and partly due to dilution effects in the plow layer because sampling was not stratified in small depths. Some soil restriction impaired by absence of plowing, probably increases in bulk density, offset the benefits of NT on plant growth and was responsible for the smaller yield in this tillage system compared with CT.

Lime and Manure Amendment Improve Soil Fertility, Productivity and Nutrient Uptake of Rice-Mustard-Rice Cropping Pattern in an Acidic Terrace Soil

“…In the case of BARI Shorisha14 and BRRI dhan28, it ranged from 16 to 44% and 21 to 44%, respectively. Liming has also been linked to an increase in crop yields [52,53]. In addition, interactive effects of N and P fertilizers increases chlorophyll content, stomatal conductance and quantum yield of photosystem II resulting in higher yield of crops [54].…”

Fungos micorrízicos arbusculares associados a doses de fósforo no crescimento da cultura do milho

“…Essa região apresenta diversas características para o cultivo do milho, sendo os fatores favoráveis para os cultivos a topografia planiforme e textura do solo que melhora a mecanização das áreas, além de apresentar pluviometria adequada para o desenvolvimento de diversas culturas. No entanto, a obtenção de maiores produtividades é dificultada por fatores como o pH ácido dos solos, elevada saturação por alumínio e baixa disponibilidade de fósforo nos solos do Cerrado (Ernani et al, 2002). Esses fatores trazem preocupação principalmente para a fase inicial das culturas em que o sistema radicular é menos desenvolvido e a absorção de fósforo e outros minerais é dificultada.…”