التفاصيل البيبلوغرافية
| العنوان: |
Effects of biostimulants on ornamental plants grown in solid soil less cultural systems : A thesis submitted in partial fulfilment of the requirements for the Degree of Doctor of Philosophy at Lincoln University |
| المؤلفون: |
Yuan, Ye |
| بيانات النشر: |
Lincoln University |
| سنة النشر: |
2021 |
| المجموعة: |
Lincoln University (New Zealand): Lincoln U Research Archive |
| مصطلحات موضوعية: |
biostimulants, ornamental plants, soilless culture, solid soil-less cultural systems, plant-based biostimulants, vermicompost, plant growth, humic acid, protein hydrolysates, seaweed extract, growth media, organic additives, Griselinia littoralis, ANZSRC::3108 Plant biology, ANZSRC::300802 Horticultural crop growth and development, ANZSRC::310806 Plant physiology |
| الوصف: |
With raised public awareness of potential negative effects caused by synthetic fertilisers and pesticides, there is interest amongst nursery growers for environmental friendly ways to improve plant performance. Application of plant biostimulants is one potential approach to increase plant growth with little environmental impact. The present study aimed to investigate the effectiveness of biostimulants on ornamental plants under solid soil less cultural systems, and to develop a methodology to effectively apply biostimulants that would be practicable in the ornamental nursery industry. A preliminary experiment showed variable responses to a range of recognised biostimulant products. The effectiveness of biostimulants on plants were then systematically studied to evaluate application rates, application methods, chemical nutrient status of growth media and plant species variability, with a focus on three main categories of biostimulants: humic acids (HA), protein hydrolysates (PH) and seaweed extract (SW). Optimal application rates in potting mix were 1.5 g L 1 for HA, 0.24 ml L 1 for PH and 0.25 g L 1 for SW, about half of the recommended application rates to field grown plants. Drenching was found to be the best application method. Complex interactions were found between biostimulant effects and nutrient status of the growth medium. Seaweed extracts had a better growth--stimulating effect than other biostimulants. However, the effects of all biostimulants differed greatly between plant species, and the results indicated that single dose and common prescriptive applications are unlikely to be suitable for different species of plants. In vitro assays were use to standardize variables, to investigate the combined effects of biostimulants and to evaluate the potential of plant extracts as novel biostimulants. Two combinations (0.001%HA+0.001%SW and 0.0001%HA+0.005%PH) showed positive effects, but most biostimulant combinations led to detrimental effects on plant growth. It was also found that optimal application ... |
| نوع الوثيقة: |
thesis |
| اللغة: |
English |
| العلاقة: |
https://researcharchive.lincoln.ac.nz/bitstream/10182/14319/5/Yuan_Y_PhD.pdf.jpgTest; https://hdl.handle.net/10182/14319Test; Q112957335 |
| الإتاحة: |
https://hdl.handle.net/10182/14319Test |
| حقوق: |
https://researcharchive.lincoln.ac.nz/page/rightsTest |
| رقم الانضمام: |
edsbas.FB3CABE9 |
| قاعدة البيانات: |
BASE |
