| 稻虾共作磷素平衡特征及生态经济效益研究 |
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| 引用本文： | 刘少君,李文博,熊启中,李虹颖,李军利,刘荣,郜红建,叶新新.稻虾共作磷素平衡特征及生态经济效益研究[J].农业环境科学学报,2021,40(10):2179-2188. |
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| 作者姓名： | 刘少君 李文博 熊启中 李虹颖 李军利 刘荣 郜红建 叶新新 |
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| 作者单位： | 农田生态保育与污染防控安徽省重点实验室,安徽农业大学资源与环境学院,合肥 230036;安徽省农业科学院土壤肥料研究所,合肥 230001;安徽六国化工股份有限公司,安徽 铜陵 244021 |
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| 基金项目： | 国家重点研发计划项目（2017YFD0301302）；国家自然科学基金项目（41701581）；安徽省杰出青年科学基金项目（2008085J13）；长江经济带磷资源高效利用创新平台项目（KJ20190197） |
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| 摘 要： | 为研究稻虾共作生态系统磷素平衡状况和利用效率,通过田间试验,采用投入产出法,设置3个处理:水稻单作(RM)、稻虾共作投食(RC feed 1)、稻虾共作不投食(RC feed 0),分析了稻虾共作种植模式下水稻产量、磷素平衡状况、利用效率、环境风险以及经济效益。研究结果表明:3种处理水稻产量无显著差异;农田磷平衡均表现为盈余,RC feed 0处理农田磷盈余低于RM和RC feed 1处理;与RM和RC feed 1处理相比较,RC feed 0处理水稻茎叶磷素吸收量显著增加(P0.05),磷素利用率较高。在种植前期(6—8月),RC feed 0处理较RC feed 1处理显著降低了稻田田面水总磷和溶解磷的浓度;在水稻收获时,3个处理间稻田田面水总磷和溶解磷的浓度无显著差异。与RM处理相比较,RC feed 0和RC feed 1处理净收入分别增加了54.22%和51.11%。在综合考虑水稻产量效应、磷素平衡、磷素环境风险和经济效益的条件下,稻虾共作不投食模式是一种资源利用率较高、环境风险较小、经济效益好的种养模式。
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| 关 键 词： | 稻虾共作 磷平衡 磷循环 经济效益 |
| 收稿时间： | 2021/3/5 0:00:00 |
Phosphorus balance and eco-economic benefits in the integrated rice-crayfish system |
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| LIU Shaojun,LI Wenbo,XIONG Qizhong,LI Hongying,LI Junli,LIU Rong,GAO Hongjian,YE Xinxin.Phosphorus balance and eco-economic benefits in the integrated rice-crayfish system[J].Journal of Agro-Environment Science( J. Agro-Environ. Sci.),2021,40(10):2179-2188. |
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| Authors: | LIU Shaojun LI Wenbo XIONG Qizhong LI Hongying LI Junli LIU Rong GAO Hongjian YE Xinxin |
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| Institution: | Anhui Province Key Farmland Ecological Conservation and Pollution Prevention, School of Resources and Environment, Anhui Agricultural University, Hefei 230036, China;Institute of Soil and Fertilizer, Anhui Academy of Agricultural Sciences, Hefei 230001, China;Anhui Liuguo Chemical Industry, Tongling 244021, China |
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| Abstract: | Recently, the rice-crayfish system has developed rapidly in the middle and lower reaches of the Yangtze River in China. The integrated rice-crayfish system is an emerging complex ecological system for planting and breeding in this region. The study of P balance and P use efficiency in the integrated rice-crayfish system is of great significance to systematically guide P management, optimize the rice-crayfish symbiosis system, and to assess the environmental and economic benefits. In this study, a field experiment was conducted and included three treatments:rice monoculture system(RM), rice-crayfish with feed(RC feed 1), and rice-crayfish without feed(RC feed 0). The rice yield, P balance, P use efficiency, and economic and ecological benefits of the integrated rice-crayfish system were then analyzed. The results showed that there were no significant differences in rice yield across treatments, and the P balance of all three treatments in the farmland system were in surplus. The P surplus in the RC feed 0 treatment was lower than that in the RM and RC feed 1 treatments. The P uptake efficiency and P accumulation in the stems and leaves of rice in the RC feed 0 treatment were significantly(P<0.05) higher than those in the RM and RC feed 1 treatments. In the early stage(from June to August), the RC feed 0 treatment significantly reduced the total P(TP) and dissolved P(DP) concentrations in the surface water, compared with the RM and RC feed 1 treatments. There were no significant differences in TP and DP concentrations at the harvest stage. Compared with the RM treatment, RC feed 0 and RC feed 1 treatments increased net revenue by 54.22% and 51.11%, respectively. Considering rice yield, P surplus, and environmental effects, the integrated rice-crayfish system without feed is a suitable alternative for rice crop systems in this area and could be a recommended model for this region due to the high utilization efficiency of resources, low environmental risk, and good economic benefits. |
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| Keywords: | integrated rice-crayfish system phosphorus balance phosphorus cycle economic benefits |
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