Spatial distribution of Yellow Sigatoka Leaf Spot correlated with soil fertility and plant nutrition

被引:21
作者
Freitas, A. S. [1 ]
Pozza, E. A. [1 ]
Alves, M. C. [2 ]
Coelho, G. [2 ]
Rocha, H. S. [3 ]
Pozza, A. A. A. [4 ]
机构
[1] Univ Fed Lavras, Dept Plant Pathol, POB 3037, BR-37200000 Lavras, MG, Brazil
[2] Univ Fed Lavras, Dept Engn, POB 3037, BR-37200000 Lavras, MG, Brazil
[3] Embrapa Cassava & Fruits, Rua Embrapa S-N,POB 007, BR-44380000 Cruz Das Almas, BA, Brazil
[4] Univ Fed Lavras, Dept Soil Sci, POB 3037, BR-37200000 Lavras, MG, Brazil
关键词
Banana; Geostatistics; Mineral nutrition; Mycosphaerella musicola; MINERAL-NUTRITION; POTATO-TUBERS; DISEASE; FERTILIZATION; VARIABILITY; SEVERITY; BANANA;
D O I
10.1007/s11119-015-9409-6
中图分类号
S [农业科学];
学科分类号
09 ;
摘要
This study analyzed the spatial distribution of Yellow Sigatoka Leaf Spot relative to soil fertility and plant nutritional status using geostatistics. The experimental area comprised 1.2 ha, where 27 points were georeferenced and spaced on a regular grid 18 x 18 m. The severity of Yellow Sigatoka, soil fertility and plant nutritional status were evaluated at each point. The spherical model was adjusted for all variables using restricted maximum likelihood. Kriging maps showed the highest infection rate of Sigatoka occurred in high areas of the field which had the highest concentration of sand, while the lowest disease was found in lower areas with lower silt, organic matter, total exchangeable bases, effective cation exchange capacity, base saturation, Ca and Mg in soil, and foliar sulfur (S). These results may help farmers manage Yellow Sigatoka disease more effectively, with balanced fertilization and reduced fungicide application. This practice minimizes the environmental impact and cost of production while contributing to production sustainability.
引用
收藏
页码:93 / 107
页数:15
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