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不同土壤质地和含水率对炭基肥料氮素矿化的影响
李京京1, 刘文2, 任天宝3, 阎海涛3, 杜飞乐3, 张璐3, 李朋彦3, 刘英杰2, 刘国顺3
1.河南农业大学烟草学院/河南省生物炭研究工程技术中心/黄鹤楼科技园(集团)有限公司;2.河南省烟草公司郑州市公司;3.河南农业大学烟草学院/河南省生物炭研究工程技术中心
摘要:
为了探究土壤特性对炭基肥料氮素矿化的影响,采用室内培养和大田小区试验,分析了炭基肥在不同土壤质地(砂质壤土、粉砂质壤土、黏土)及含水率(80%、60%、40% 田间最大持水量)条件下,氮素矿化动态变化特征。结果表明:在室内培养条件下,对于不同土壤质地,炭基肥在砂质壤土条件下矿化势最高,其次为黏土,最低的为粉砂质壤土;对于不同田间持水量,在粉砂质壤土条件下,炭基肥矿化势最高的为80% 田间最大持水量(80%SMC),其次为60%SMC,最低的是40%SMC;在砂质壤土和黏土条件下,炭基肥的矿化势均表现为60%SMC > 80%SMC > 40%SMC。培养状态下粉砂质壤土、砂质壤土、黏土条件下最大氮素有效性分别是34.12%、56.31%、41.14%,而在大田条件下,炭基肥单季氮素最大矿化率在粉砂质壤土、砂质壤土、黏土3种土壤质地下分别是50.61%、32.27%、34.29%。
关键词:  炭基肥  氮素矿化  土壤质地  土壤含水率
DOI:10.13758/j.cnki.tr.2020.01.006
分类号:S572
基金项目:国家重点研发计划课题项目(2017YFD0200808)和河南省烟草公司项目(ZYKJ201416、ZYKJ201501)资助。
Effects of Soil Texture and Moisture on Nitrogen Mineralization Rate of Biochar-based Fertilizer
LI Jingjing,LIU Wen,REN Tianbao,YAN haitao,DU Feile,ZHNAG Lu,LI Pengyan,LIU Yingjie,LIU Guoshun
1.Tobacco college of Henan Agricultural University/Henan Biochar Engineering Research Center Zhengzhou;2.Zhengzhou City Tobacco Company of HenanProvince
Abstract:
In order to study the effect of soil texture and water content on nitrogen mineralization of biochar-based fertilizer, an indoor incubation and field experiment were conducted to study the characteristics of nitrogen mineralization under different soil textures (sandy loam, silty loam, clay) and soil moistures (80%, 60%, 40% of SMC). The results showed that the mineralization potential of the sandy loam was the highest, followed by clay, and silty loam was the lowest; The mineralization potential was in an order of 80%SMC>60%SMC>40%SMC for silty loam, 60%SMC>80%SMC>40%SMC for sandy loam and clay, the maximum nitrogen availability were 34.12% for silty loam, 56.31% for sandy loam, 41.14% for clay, respectively. The nitrogen availability of biochar-based fertilizer in single season under field conditions under three soil types the sand loam clay were 50.61% for silty loam, 32.27% for sandy loam and 34.29% for clay.
Key words:  Biochar-based fertilizer  Nitrogen mineralization  Soil texture  Soil moisture

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