不同改良剂对绿化种植土改良效果研究

Effects of different amendments on landscape and garden soils improvement

利用自主配制的改良剂改良绿化种植土,通过向种植土中按体积比1∶1添加不同改良剂,然后进行簕杜鹃盆栽试验,测定土壤理化性质及簕杜鹃叶片叶绿素(SPAD值)、株高、冠幅、根系活力及根系体积等指标,评估不同改良剂对绿化种植土的改良效果。结果表明:不同改良剂均可以不同程度地改善种植土理化性质;定植后140 d,添加改良剂的处理簕杜鹃株高、冠幅、叶片叶绿素含量、根系活力和根系体积均高于对照(CK0)(P <0. 05),其中T3 (堆肥产品+5%调理剂B+种植土)、T4 (堆肥产品+5%调理剂B+1. 0%微生物菌剂A+种植土)及T5 (堆肥产品+5%调理剂B+1. 0%微生物菌剂A+种植土)处理效果较好。利用Pearson对簕杜鹃生理指标和土壤理化指标相关性进行分析,结果表明,植物长势与其生长的土壤有机质含量、物理性质(通气度、入渗率及容重等)密切相关,而T3、T4和T5处理效果较好是与其使用的改良剂中添加了一定量生物炭混合物有关。

Aiming at understanding the effects of different amendnlents on improving the qualities of landscape and garden soils, we conducted a pot experiment, mixing landscape and garden soils with several domestically developed soil amendnlents in a volume ratio of 1 ： 1, to monitor and evaluate concerning physiological parameters of Bougainvillea glabra. The experimental treatments were with CK0 （planting soil only）, CK1 （planting soil ＋ composting manure ＋ 5% regulator A）, T1 （CK1 ＋ 0. 5% microbial agent A）, T2 （ CK1 ＋ 1.0% microbial agent A）, T3 （ planting soil ＋ composting manure ＋ 5% regulator B）, T4 （ T3 ＋ 0. 5% microbial agent A）, T5 （T3 ＋ 1.0% microbial agent A）, T6 （T3 ＋75 g.m 3phosphorite powder）, and T7 （planting soil ＋ composting manure ＋ 5% regulator C） . The results showed that all amendments improved soil physieoehemieal properties. Compared with CK0, soil a- mendments significantly increased plant height, crown diameter, chlorophyll content and root activity at the 140th day after planting （ P 〈 0. 05 ）, respectively. T3, T4 and T5 treatments showed better effects than the other treatments. We also analyzed the Pearson cor- relation between physiological parameters of Bougainvillea glabra and soil physieoehemieal properties, and showed that the plan growth was closely related to soil organic content and soil physical properties. We concluded that the adding bioehar would improve perform- anees of T3, T4 and T5 treatments.