土壤改良剂(CMC)在新垦耕地土壤改良中的应用  

The Application of Soil Conditioner(CMC)in Soil Improvement of New Cultivating Farmland

作　　者：李婷 朱立安 林梓 邵社刚[2] 倪栋[2] 林兰稳 LI Ting;ZHU Li’an;LIN Zi;SHAO Shegang;NI Dong;LIN Lanwen(Institute of Eco-environmental and Soil Sciences,Guangdong Academy of Sciences/National-regional Joint Engineering Research Center for Soil Pollution Control and Remediation in South China/Guangdong Key Laboratory of Integrated Agro-environmental Pollution Control and Management,Guangzhou 510650;Research Institute of Highway,Ministry of Transport/Key Laboratory of Road Traffic and Environmental Protection Technology,Beijing 100088)

机构地区：[1]广东省科学院生态环境与土壤研究所/华南土壤污染控制与修复国家地方联合工程研究中心/广东省农业环境综合治理重点实验室,广州510650 [2]交通运输部公路科学研究院/公路交通环境保护技术交通运输行业重点实验室,北京100088

出　　处：《中国农学通报》2023年第21期88-93,共6页Chinese Agricultural Science Bulletin

基　　金：广东省重点领域研发计划“广东红树林生态修复和功能提升技术研究与示范”(2020B020214001);海南省自然科学基金“海南橡胶林地土壤侵蚀监测及防控研究”(421RC658);国家自然科学基金项目“珠三角水稻土耕层下有机碳的积累和稳定性分析”(41771232);公路交通环境保护技术交通运输行业重点实验室资助“生物菌肥在公路护坡中的应用研究”(2020-8804)。

摘　　要：比较高分子材料不同施用量对新垦耕地土壤的培肥效果,可为促进新垦耕地快速熟化提供科学依据。以狗牙根为供试作物,通过盆栽试验,研究不同羧甲基纤维素钠(Sodium carboxymethyl cellulose,CMC)施用量(0.04%、0.08%、0.12%、0.16%、0.20%)与蚯蚓粪、复合生物菌剂混施对新垦耕地狗牙根生长和土壤养分的影响。结果表明:与CK相比,不同施用量CMC配合施肥处理下,狗牙根地上部和根系生物量均显著增加,是CK处理的33.8~37.5、5.0~5.9倍,根冠比显著降低84.1%~86.3%,以0.16%CMC处理狗牙根生物量最高;施用CMC处理土壤养分含量有显著影响,土壤有机质、全磷含量在0.16%CMC处理下为最大值,较CK处理分别显著增加187.9%、19.2%;土壤>0.25 mm水稳性团聚体含量显著增加24.2%~138.9%,以0.20%CMC处理为最大值。综合而言,以0.16%CMC施用量对狗牙根生长的促生作用和土壤有机质、全磷含量的培肥作用最佳,以0.20%CMC施用量对土壤水稳性团聚体含量改良作用最好。Exploring the effects of different application rates of polymer materials on soil fertility in new cultivating farmland is helpful to provide a scientific basis for rapid maturation of new farmland.Bermudagrass was used as the research material and a pot experiment was conducted to explore the effects of sodium carboxymethyl cellulose(CMC)(0.04%,0.08%,0.12%,0.16%and 0.20%)mixed with vermicompost and compound biological inoculants on plant growth and soil nutrients in new cultivating farmland.The results showed that the overground part and root biomass of bermudagrass were significantly increased under different CMC treatments,which were 33.8-37.5 and 5.0-5.9 times than those of CK,respectively,and the root-shoot ratio was decreased by 84.1%-86.3%.The biomass of bermudagrass showed the highest value in 0.16%CMC treatment.The CMC treatments had significant effect on soil nutrient content,the content of soil organic matter and total phosphorus showed the maximum value in 0.16%CMC treatment,which were 187.9%and 19.2%higher than those of CK,respectively.The>0.25 mm water-stable aggregate content was significantly increased by 24.2%-138.9%in CMC treatment,and the highest value was found in 0.20%CMC treatment.In conclusion,the 0.16%CMC treatment had the best effect on the growth promotion of bermudagrass and the increase of soil organic matter and total phosphorus contents,while the best effect on the improvement of soil water-stable aggregate was achieved in 0.20%CMC treatment.

关 键 词：羧甲基纤维素钠 新垦耕地 狗牙根 土壤养分 土壤水稳性团聚体 

分 类 号：S156.2[农业科学—土壤学]