自制多功能土壤改良剂对土壤性状及核桃生长的影响

Effects of self-made multifunctional soil conditioners on soil properties and the growth of Juglans regia

采用盆栽试验,通过测定不同土壤改良剂处理条件下土壤的物理性质以及苗木的生长和生理指标,探讨土壤改良剂对土壤性质及核桃生长的影响,并利用方差分析和因子分析法,评价3种自制多功能土壤改良剂(Ⅰ、Ⅱ、Ⅲ)和1种市场土壤改良剂对核桃苗木生长的作用效果。结果表明:施用土壤改良剂能提高土壤孔隙度和土壤持水能力,降低土壤密度,并能促进核桃苗木的生长,且自制多功能土壤改良剂的作用效果明显优于市场土壤改良剂;与对照和市场土壤改良剂相比,施用自制多功能土壤改良剂Ⅰ的苗木,新稍长度分别增长44.1%和36.3%,地径增长20.4%和11.6%,生物量增长32.3%和8.2%,光合速率提高35.6%和15.1%,蒸腾速率降低26.7%和15.6%——因此,自制多功能土壤改良剂Ⅰ为最优配方。

A pot experiment was conducted to explore the effects of soil conditioners on soil properties and growth of Juglans regia seedlings,through the determination of soil physical properties and the indexes of growth and physiological on J. regia seedlings with different treatments. The effects of three self-made multifunctional soil conditioners（ Ⅰ,Ⅱ,Ⅲ） on the growth of J. regia seedlings were compared with an ordinary soil conditioner by using variance analysis and factor analysis on soil physical properties and the physiological indicators. The results showed that the application of soil conditioner could significantly improve soil porosity and soil water holding capacity,decrease soil bulk density,and promote the growth of J. regia seedlings. Soil conditioners had significant influences on soil properties and growth of J. regia seedlings. The effects of self-made multifunctional soil conditioners were better than the ordinary soil conditioner. The length of shoots treated with self-made multifunctional soil conditioner Ⅰ was 44. 1% higher than that of the control group and 36. 3% higher than that of the ordinary soil conditioner. Compared with the control group and the ordinary soil conditioner,the ground diameter of self-made multifunctional soil conditioners Ⅰ increased by 20. 4% and 11. 6%,and the biomass of self-made multifunctional soil conditioners Ⅰ increased by 32. 3% and 8. 2%,and the photosynthetic rate of self-made multifunctional soil conditioner Ⅰ increased by 35. 6% and 15. 1%,while the transpiration rate of self-made multifunctional soil conditioner Ⅰ decreased by 26. 7 % and15. 6%,respectively. Hence,the self-made multifunctional soil conditioner Ⅰcan be used as the optimal formula. This study had a certain guiding function for exploring soil conditioner of environmental protection composite.