Effects of Nitrogen Fertilizers and Bacillus spp. on the Growth of Bermuda Turf.
| Autor: | Jie-Ming Li, 李捷閔 |
|---|---|
| Rok vydání: | 2016 |
| Druh dokumentu: | 學位論文 ; thesis |
| Popis: | 104 The objective of this study was to evaluate the effects of nitrogen fertilizers and Bacillus spp. applied as PGPR(plant growth-promoting rhizobacteria) on the growth of bermudagrass. Bacillus spp. included B. mycoides (BM), B. subtilis (BS), and B. amyloliquefaciens (BA). Nitrogen fertilizers included three water-soluble fertilizers (calcium nitrate, ammonium sulfate, and urea) and one slow-release organic fertilizer were applied. In order to compare the differences between inoculation methods, cell suspensions drench and Bio-Mix with cell suspensions were applied on bermudagrass. Plant growth and tissue analysis were investigated to find out correlation between Bacillus spp. and nitrogen absorption in bermudagrass. After PGPR inoculation by cell suspensions drench, BM promoted N and P contents in ‘Arizona’ bermudagrass, but reduced Fe and Cu contents in plants. BS increased dry weight/fresh weight ratio, N, and Fe contents, but decreased Mg, Mn, and Cu contents in plants. BA increased fresh weight, water content, green coverage rate, P, and Zn contents, but decreased K, Mg, Ca, Fe, Mn, and Cu contents in plants. Ca(NO3)2 application promoted water content, green coverage rate, N, Ca, and Fe contents in plants. (NH4)2SO4 treatment increased dry weight, dry weight/fresh weight ratio, green coverage rate, N, Mn, and Zn contents in plants. Urea application increase P, K, and Cu contents in plants. After PGPR inoculation by Bio-Mix, BM increased dry weight/fresh weight ratio, N, P, Mg, and Mn contens in ‘Arizona’ bermudagrass, but decreased water content and Fe content on plants. BS increased green coverage rate, Fe, and Mn contents but decreased K and Ca contents in plants. BA promoted P, Fe, and Mn contents, but reduced Cu content in plants. Ca(NO3)2 application promoted dry weight/fresh weight ratio, N, and Ca contents, but decreased water content, Fe, and Mn contents in plants. (NH4)2SO4 treatment increased fresh weight, dry weight, and Mn content, but reduced K and Ca contents in plants. Urea application increased green coverage rate, K, and Fe contents, but decreased Ca and Mn contents in plants. BM inoculation promoted dry weight, water content, Mg, Ca, and Cu contents in common bermudagrass, but reduced dry weight/fresh weight ratio, K, and Fe contents in plants. BS inoculation increased K, Mg, Ca, and Mn contents, but decreased dry weight, P, Fe, Zn, and Cu contents in plants. Ca(NO3)2 application promoted fresh weight, K, Mg, Ca, and Cu contents in plants. (NH4)2SO4 treatment decreased K, Mg, Ca, and Cu contents in plants. Urea application increased Mg and Ca contents in plants. BM inoculation also promoted fresh weight, dry weight, soil pH, P, K, and Zn contents in ‘Dwarf’ bermudagrass, but reduced green coverage rate, N, Mg, Ca, Fe, Mn, Cu contents in plants, and starch content in leaf. Urea application increased chlorophyll content in leaf, but decreased micro element contents in plants. Organic fertilizer application increased soil EC, all nutrient element contents in plants, and free amino acid content in leaf, but reduced total soluble sugar and starch contents in leaf. |
| Databáze: | Networked Digital Library of Theses & Dissertations |
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