Abstract
Polymer seed coating with micronutrients may affect soybean (Glycine max (L.) Merr) growth and yields under dryland conditions. The objective of t his study was to determine the effect of two seed application rates (265 and 395 mL 100 kg seeds -1 ) of polymer based mixture of Copper (Cu), Manganese (Mn) and Zinc (Zn) micronutrients on dryland soybeans near Blackville, SC from 2011 to 2012. Soybeans were evaluated for plant Normalized Difference Vegetation Index (NDVI), Leaf Area Index (LAI), plant height, seed weight and grain yi elds. Compared to untreated control, polymer seed coating significantly increased grain yields by 8.1 and 14.0% with seed applications at 265 and 395 mL 100 kg seeds -1 , respectively. Plant NDVI improved by 10.5% with a pplication of polymer seed coating treatment at 395 mL 100 kg seeds -1 . Seed coating at 265 and 395 mL 100 kg seeds -1
Highlights
Results from this study showed that polymer seed coating with micronutrients increased plant Normalized Difference Vegetation Index (NDVI) by 10.5% at 395 mL 100 kg seeds−1, 10.2 and 10.8% at 8 weeks and 4.6 and 4.2% at 10 weeks after planting soybeans at 265 mL and 395 mL 100 kg seeds−1, respectively
This study investigated the effects of two polymer seed coating application rates on growth and yield of soybeans grown under dryland conditions
Application of seed coating to seeds at 265 mL 100 kg seeds−1 improved plant NDVI by 10.5% and applications of 285 mL and 395 mL 100 kg seeds−1 improved plant NDVI by 10.2 and 10.8% at 8 weeks after planting soybeans and 4.6 and 4.2% over control at 10 weeks after planting crop
Summary
Micronutrient deficiency in the soil, enhanced by excessive rain or application of fertilizers, leads to drastically reduced yields (Konkol et al, 2012). Xie et al (2011) noted that applications of Nitrogen (N), Phosphorus (P) and Potassium (K) fertilizers affected soil properties, where N increased corn shoot Cu concentration and P decreased availability of Copper (Cu) and Lead (Pb). Wozniak and Makarski (2012) reported that 90 kg N ha−1 improved uptake of K, Iron (Fe), Zinc (Zn) and Cu, while high rates at 150 kg N ha−1 increased concentrations of grain Manganese (Mn) in wheat (Triticum aestivum L.). P may help increase grain yield, excess of this nutrient decreased Zn and enhanced Fe, Cu andMn uptake in wheat biomass (Zhang et al, 2012). Micronutrient deficiency in the soil, enhanced by excessive rain or application of fertilizers, leads to drastically reduced yields (Konkol et al, 2012). Xie et al (2011) noted that applications of Nitrogen (N), Phosphorus (P) and Potassium (K) fertilizers affected soil properties, where N increased corn shoot Cu concentration and P decreased availability of Copper (Cu) and Lead (Pb). P may help increase grain yield, excess of this nutrient decreased Zn and enhanced Fe, Cu and. Deficiencies of Zn, Fe and Fe decrease wheat yields in light soils, so application of these micronutrients may help to increase yields of susceptible wheat cultivars (Narwal et al, 2012). Kobraee and Shamsi (2011a) noted that micronutrient concentrations changed during growing season of soybeans from R1 (beginning bloom) to R8 (full maturity) stages with Fe decreasing in leaves and stems faster than other nutrients. Micronutrients Zn, Fe and Mn were translocated from stems to leaves and Science Publications
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