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混合方式对泡沫砂与土壤混合均匀性的影响
于全波1, 王美艳1, 田育天2, 史学正1, 徐灵颖1, 徐胜祥1, 史艺杰1, 李湘伟2, 谢新乔2
1.土壤与农业可持续发展国家重点实验室(中国科学院南京土壤研究所);2.红塔烟草(集团)有限责任公司
摘要:
通过设置常规混合+风干态泡沫砂(CK)、常规混合+水浸态泡沫砂(1T)、常规混合+泥浆态泡沫砂(2T)、分层混合+风干态泡沫砂(3T)和分层混合+水浸态泡沫砂(4T) 5个处理,研究了不同混合方式对泡沫砂和土壤混合均匀性的影响,并采用容重的标准差和变异系数表征混合均匀性。结果表明:泡沫砂形态显著影响了混合均匀性。采用常规混合时,水浸态泡沫砂显著增加了0 ~ 10 cm和0 ~ 20 cm土层混合均匀性,容重的标准差比风干态泡沫砂分别降低了188% 和105%,容重的变异系数分别降低了62.1% 和50.1%;与风干态泡沫砂相比,泥浆态泡沫砂不仅显著降低了不同土层的混合均匀性,还显著降低了混合物内部的混合均匀性,0 ~ 10 cm土层容重的标准差和变异系数分别比10 ~ 20 cm土层显著增加68.1% 和50.8%。单变量分析表明,混合方式对混合均匀性无显著性影响,混合方式和泡沫砂形态之间无交互效应,泡沫砂形态是影响泡沫砂和土壤混合均匀性的主要因素。采用水浸态泡沫砂在常规混合方式下与土壤混合,不仅提高了混合物整体以及不同土层的混合均匀性,而且还降低了不同层次之间混合均匀性的差异。因此,建议采用常规混合+水浸态泡沫砂的方式混合土壤和泡沫砂。
关键词:  混合均匀性  泡沫砂  混合方式  容重
DOI:10.13758/j.cnki.tr.2020.04.024
分类号:S156.2
基金项目:国家自然科学基金项目(41571209,41401240)和红塔烟草(集团)有限公司科技项目(HT2016-6221)资助。
Effect of Mixing Methods on Mixing Uniformity of Porous Clay Ceramic and Soil
YU Quanbo1, WANG Meiyan1, TIAN Yutian2, SHI Xuezheng1, XU Lingying1, XU Shengxiang1, SHI Yijie1, LI Xiangwei2, XIE Xinqiao2
1.State Key Laboratory of Soil and Sustainable Agriculture, Institute of Soil Science, Chinese Academy of Sciences;2.Hongta Tobacco Group Company Limited
Abstract:
Five treatments were designed to investigate the effects of different mixing methods on the mixing uniformity of porous clay ceramic (PLC) and soil, including conventional mixing method + air-dried PLC(CK), conventional mixing method + water-immersed PLC(1T), conventional mixing method + mud-state PLC(2T), layered mixing method + air-dried PLC(3T) and layered mixing method + water-immersed PLC(4T). And the mixing uniformity is characterized by the standard deviation and variation coefficient of bulk density. The results showed that the form of PLC significantly affected the mixing uniformity. When conventional mixing was used, the water-immersed PLC significantly increased the mixing uniformity of 0-10 cm and 0-20 cm soil layers, and the standard deviation of bulk density was reduced by 188% and 105%, respectively, compared with the air-dried PLC; the variation coefficient of bulk density was reduced by 62.1% and 50.1%, respectively. The muddy PLC not only significantly reduced the uniformity of different soil layers mixed with PLC and soil, but also significantly increased the difference in mixing uniformity between 0-10 cm and 10-20 cm soil layers. The standard deviation and variation coefficient of bulk density in 0-10 cm soil layers were 68.1% and 50.8% significantly higher than 10-20 cm. Univariate analysis showed that the mixing method had no significant effect on the mixing uniformity, and there was no interaction between the mixing method and the forms of PLC. However, the form of PLC was the main factor affecting the mixing uniformity of PLC and soil. The use of water-immersed PLC mixed with the soil in a conventional mixing method not only improved the mixing uniformity of the whole mixture and different soil layers, but also reduced the difference in mixing uniformity between different layers, therefore, it is recommended for mixing soil and PLC.
Key words:  Mixing uniformity  Porous clay ceramic  Mixing method  Bulk density

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