首页|稻蟹共作对土壤理化性质及土壤酶活性的影响

稻蟹共作对土壤理化性质及土壤酶活性的影响

扫码查看
原文链接
  • NETL
  • NSTL
  • 万方数据
为探究稻蟹共作对土壤理化性质及土壤酶活性的影响，采用水泥池模拟稻田环境的方法，对比研究了稻蟹共作与水稻单作模式7个土壤理化指标和4个土壤酶活性的差异。结果表明:与稻田单作相比，稻蟹共作对土壤容重、土壤含水率和土壤还原性物质总量均有显著影响(P＜0。05);稻蟹组的总有机碳略高于稻田组，但总氮略低于稻田组;稻蟹组与稻田组的Eh存在极显著差异，两组之间差异达20。95％;稻蟹组和稻田组土壤粒径机械组成均为粉粒＞粘粒＞粗细砂粒，粉粒占比均超过80％，且两组之间存在显著差异(P＜0。05);随着土壤深度的增加，稻田组的四种酶活性均呈显著下降趋势;稻蟹组的脲酶、纤维素酶和蔗糖酶活性变化与稻田组一致，呈显著下降趋势，但其酸性磷酸酶没有变化。可见，稻蟹共作系统由于河蟹的引入，降低了土壤容重，提高了土壤含水率，改良了土壤，其水稻根系分布较多的10～15 cm底层土壤显示了较强的土壤酶活性，促进了水稻对稻蟹共作系统中碳、氮等元素的高效利用。因此，稻蟹共作系统既有利于水稻生长，又有利于河蟹养殖，可以作为一种生态种养模式在江苏地区推广应用。
Effects of Rice-crab Coculture on Soil Physical and Chemical Properties and Soil Enzyme Activities
To explore the effects of rice-crab coculture on soil physical and chemical properties and soil enzyme activities,the differences of seven soil physical and chemical indexes and four soil enzyme activities between rice-crab coculture and rice monoculture were studied by using the cement pond simulating paddy field environment.The results showed that there were significant differences in soil bulk density,soil water content and total reducing substances between rice-crab coculture and rice monoculture(P＜0.05).The total organic carbon of the rice-crab group was slightly higher than that of rice filed group,but the total nitrogen was slightly lower than that of rice field group.There was a significant difference in Eh between the rice-crab group and the rice monoculture group with a difference of 20.95％.The mechanical composition of soil particle size in rice-crab group and rice field group was silt＞clay＞coarse and fine sand,and the proportion of silt was more than 80％,and there was a significant difference between the two groups(P＜0.05).With the increase of soil depth,the activities of four enzymes in rice filed group decreased significantly.The activities of urease,cellulase and sucrase in the rice-crab group showed the same trends as those in the rice field group,but the acid phosphatase did not change.It could be seen that the introduction of crabs into the integrated rice-crab system reduced the soil bulk density,increased the soil water content,and improved the soil quality.Soil enzyme activities were stronger in the 10-15 cm bottom soil where rice roots were more distributed,which promoted the efficient utilization of carbon and nitrogen by rice in the integrated rice-crab system.Therefore,the integrated rice-crab system is beneficial to both rice growth and crab culture,and can be used as an ecological planting and breeding model in Jiangsu Province.

rice-crab coculturesoil bulk densitysoil water contenttotal reducing substancessoil particle diametersoil enzyme activity

陈友明、郭晏汝、马行空、田间、董元华

展开 >

土壤与农业可持续发展重点实验室(中国科学院),南京 210008

中国科学院大学,北京 100049

江苏省淡水水产研究所,南京 210017

山东省烟台市城市管理局,山东烟台 264001

展开 >

稻蟹共作 土壤容重 土壤含水率 土壤还原性物质总量 土壤粒径 土壤酶活性

江苏省种业振兴"揭榜挂帅"项目江苏省现代农业重点项目江苏省河蟹产业技术体系建设项目种质创制与苗种繁育创新团队项目

JBGS[2021]126BE2019393JATS[2022]409

2024

中国农学通报
中国农学会

中国农学通报

CSTPCD
影响因子：0.891
ISSN：1000-6850
年,卷(期)：2024.40(18)