洋紫荆施肥试验及经济效益分析

Fertilization experiment and economic analysis on Bauhinia variegate Linn. Sp. PL

通过对洋紫荆中等规格苗木施肥试验表明:肥料种类对洋紫荆苗木胸径净生长有极显著差异,施肥量对胸径净生长量有显著差异,施肥次数对胸径生长没有显著差异;肥料种类、施肥量和施肥次数对冠幅净生长量均有极显著差异;肥料种类、施肥量和施肥次数对树高净生长量无显著差异。通过施肥,可加快洋紫荆苗木胸径生长速度,提高苗木出圃径级。以每株施用无机复合肥150 g,年施肥3次计算,9个月后每667 m2产值比不施肥增长20.17%,每667 m2每年比不施肥增收3 823.8元,经济效益可观。

Fertilization experimentswere carried out with medium specification seedlingsof Bauhinia variegate Linn. Sp. PL. Fertilizer types have extremely marked differences on seedlings' diameter at breastheight(DBH) net growth production, and fertilization amounts have marked differences on DBH net growth production, butfertilization times haven't marked differences on DBH net growth production. All of the fertilizer types, fertilizationamounts and fertilization times have marked differences on crown diameter net growth production, but haven't markeddifferences on tree height net growth production. Fertilizing can accelerate the DBH growth and increase the diameter class. Comparing the CK, applying inorganic compound fertilizer(150 g each plant, 3 times per year) for 9 months can increase the output per 667 m2 by 20.17%, and increase the income per 667 m2 by 3 823.8 yuan every year. The economic efficiency wasconsiderable.