Plant growth indicators of different willow varieties depending on fertilizer and harvesting cutting time
Abstract
Aims. To determine the formation of plant growth indicators of different varieties of willow depending on fertilizer and the time of harvesting cuttings. Methods. Field – setting up experiments, recording plant height, the number of shoots and their diameter, analysis, statistical. Results.The number of willow shoots is formed at the beginning of the growing season. At the beginning of accounting, this indicator was in the range of 6.4–19.3 units, and at the end of accounting – 6.8–20.6 units. Otherwise, the tendency of the formation of the number of shoots changed depending on the investigated elements of willow cultivation technology. Thus, the number of shoots in the Trytychynkova willow variety was 1.8–2.2 times smaller than the Zbruch variety depending on the experiment variant. Fertilizer application increased the number of shoots by 4–36 % in the Trytychynkova variety, and in the Zbruch variety by 1.2–1.7 times depending on the experiment variant. At the same time, this indicator was almost the same throughout the research years and did not change much depending on the period of harvesting cuttings.Conclusions. The growth rates of willow plants vary depending on the variety, fertilizer application, time of harvesting cuttings, and weather conditions of the research year. Thus, the height of the willow shoots did not reliaby change depending on the variety, the research year and the time of harvesting cuttings. At the end of the accountings, this indicator for the Trytychynkova willow variety was 11–31 % higher compared to areas without fertilizers, and for the Zbruch variety – by 23–33 %, depending on the research year. The number of shoots is significantly higher in the Zbruch variety. In this case, fertilizer application has a significant effect, although no clear trend in the influence of the time of harvesting cuttings and the research year has been established. The diameter of shoots is most affected by the use of fertilizers – by 12–64 % depending on the elements of the cultivation technology.
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