摘要
为了探索生物废弃物利用新途径,采用文冠果果壳(A)、古龙酸母液(B)和截短侧耳素发酵废水(C)3种废弃物的组合,通过3因素3水平正交设计方案,对辽河三角洲滨海土进行改良试验,探讨3种生物废弃物对盐碱土改良的效果,确定最优改良组合。结果表明:3种生物废弃物对盐碱土均有不同程度的改善,不施文冠果果壳、古龙酸母液施用2次、截短侧耳素发酵废水施用3次对降低土壤pH值、碱化度效果最显著;果壳用量2.5kg·m-2可显著降低土壤可溶性盐含量;果壳用量5 kg·m-2、截短侧耳素发酵废水施用3次可显著提高土壤养分含量;古龙酸母液施用3次可显著提高全磷、有效磷、速效钾含量。综合考虑生物废弃物对土壤各指标的影响与经济效益,确定适合改良滨海盐碱土的最优组合为文冠果果壳用量2.5 kg·m-2、古龙酸母液施用2次、截短侧耳素发酵废水施用3次。
In order to explore the new application of biowastes, husk of Xanthoceras sorbifolia, concentrated 2-keto-L-gulonic acid residual solution, and fermented wastewater of pleuromutilin were adopted as ameliorants to improve the soil properties of coastal saline-alkali land in Liaohe River delta. The effects of these three biowastes on the saline-alkali soil were studied to obtain the best combination by three-factor and three-level orthogonal variance analysis. Results showed that all of these three biowastes could improve the saline-alkali soil properties at different de- grees. Using 0 kg ·m^-2 husk of X. sorbifolia, concentrated gulonic acid residual solution twice （80 mL · time-1 ） and fermented wastewater of pleuromutilin three times （400 mL · time-1 ） could significantly decrease pH and ESP of the saline-alkali soil. Using 2.5 kg·m^-2 husk of X. sorbifolia could significantly decrease the content of soluble salt, and applying 5 kg ·m^-2 husk of X. sorbifolia, fermented wastewater of pleuromutilin three times could significantly improve the soil nutritional condition. Increased soil contents of total phosphorus, available phosphorus and available potassium were observed in the treatment of concentrated gulonic acid residual solution three times. Based on the influence of the biowastes on soil indicators and economic benefits, the optimal combination to improve the coastal saline-alkali soil was 2.5 kg ·m^-2 husk of X. sorbifo- lia, concentrated gulonic acid residual solution twice and fermented wastewater of pleuromutilin three times.
出处
《生态学杂志》
CAS
CSCD
北大核心
2013年第12期3289-3296,共8页
Chinese Journal of Ecology
基金
国家科技支撑计划课题项目(2012BAD32B08)资助
关键词
生物废弃物
滨海盐碱土
盐分
养分
biowaste
coastal saline-alkali soil
salinity
nutrient.
