| 长期不同施肥对甘蔗产量稳定性、肥料贡献率及养分流失的影响 |
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| 引用本文： | 区惠平,周柳强,黄金生,曾艳,朱晓晖,谢如林,谭宏伟,黄碧燕.长期不同施肥对甘蔗产量稳定性、肥料贡献率及养分流失的影响[J].中国农业科学,2018,51(10):1931-1939. |
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| 作者姓名： | 区惠平 周柳强 黄金生 曾艳 朱晓晖 谢如林 谭宏伟 黄碧燕 |
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| 作者单位： | 广西农业科学院农业资源与环境研究所;广西农业科学院;广西壮族自治区农业生态与资源保护总站 |
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| 基金项目： | 农业部科技专项（201003014、201203030、201203021）、广西农科院项目（2015JZ10、2015JM32、2015YT30、2015YT38）、桂科合14125008-2-156，广西自然科技基金（2015GXNSFAA139098） |
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| 摘 要： | 【目的】分析长期不同施肥对甘蔗产量稳定性、肥料贡献率及氮磷养分地表径流流失的影响,明确其对甘蔗产量、肥料利用及环境效应,为南方赤红壤蔗区合理施肥,维持甘蔗高产、稳产及降低环境污染,改善农田生态系统质量提供依据。【方法】以长期肥料径流定位监测试验为基础,选取不施肥(CK)、推荐施肥(OPT)、过量施氮(OPT+N)、过量施磷(OPT+P)4个处理,分析甘蔗蔗茎8年产量变化、肥料贡献率及氮磷地表径流流失量。【结果】在种植的前4年,CK处理甘蔗蔗茎产量急剧下降,之后保持在50 t·hm-2并趋于平衡。施肥处理不同年份间波动性较大,但在相同年份内波动较小。与CK相比,施肥显著提高甘蔗蔗茎产量和稳定性,8年平均,蔗茎产量施肥处理增幅均高达70%以上。施肥处理下,蔗茎产量OPT与OPT+P处理差异不显著,但显著高于OPT+N处理。蔗茎产量稳定性三者间均差异不显著。蔗地地力贡献率在试验前4年急剧下降,肥料贡献率急剧上升。之后,两者均基本稳定在50%左右。肥料贡献率及肥料农学利用率OPT处理均显著高于或相当于OPT+N和OPT+P处理。施肥显著提高氮磷养分地表径流流失量。过量施入氮磷肥显著增加相应氮磷流失量,但对氮(磷)肥径流流失率无显著影响。【结论】长期过量施入氮磷化肥不仅没有增产、稳产优势,还造成养分流失。推荐施肥是南方赤红壤蔗区兼顾甘蔗高产稳产、高肥料贡献率及低养分流失的较好施肥模式。
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| 关 键 词： | 氮肥 磷肥 甘蔗产量 稳定性 肥料贡献率 养分流失 |
| 收稿时间： | 2017-06-27 |
Effects of Long-Term Different Fertilization on Sugarcane Yield Stability,Fertilizer Contribution Rate and Nutrition Loss |
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| OU HuiPing,ZHOU LiuQiang,HUANG JinSheng,ZENG Yan,ZHU XiaoHui,XIE RuLin,TAN HongWei,HUANG BiYan.Effects of Long-Term Different Fertilization on Sugarcane Yield Stability,Fertilizer Contribution Rate and Nutrition Loss[J].Scientia Agricultura Sinica,2018,51(10):1931-1939. |
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| Authors: | OU HuiPing ZHOU LiuQiang HUANG JinSheng ZENG Yan ZHU XiaoHui XIE RuLin TAN HongWei HUANG BiYan |
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| Institution: | 1.Agricultural Resources and Environmental Research Institute, Guangxi Academy of Agricultural Sciences, Nanning 530007;2.Guangxi Academy of Agricultural Sciences, Nanning 530007;3.Agricultural Ecology and Resource Protection Central Station, Guangxi Autonomous Region, Nanning 530000 |
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| Abstract: | 【Objective】This study was conducted to explore the response of the sugarcane yield stability, fertilizer contribution rate and N, P loss in runoff under long-term different fertilization, with an aim to provide scientific references for establishing the optimal fertilization pattern and promoting the sustainable production of sugarcane as well as the quality of agroecosystem improvement.【Method】Four different fertilization treatments (non-fertilization (CK), optimum fertilization (OPT), application of 50% N increase based on OPT (OPT+N) and application of 50% P2O5 increase based on OPT (OPT+P)) were chosen from an 8-years fertilization filed experiment. The changes of annual sugarcane stem yield, fertilizer contribution rate and N, P loss in runoff were investigated. 【Result】At the first 4 years of planting, sugarcane yield declined sharply, and then kept equilibrium around 50 t·hm-2, while fertilization treatments showed a fluctuation in different years, and kept the same trend in the same year. Fertilization significantly increased the sugarcane yield and its stability. With an average of 8 years, sugarcane yield under fertilizer treatments was 70% higher than that under CK. However, there was no significant increase between OPT and OPT+N treatments in sugarcane yield, while OPT was higher than OPT+N treatment. There was no significant difference among fertilizer treatments in sugarcane yield stability. The soil contribution rate in sugarcane field declined sharply at the first 4 years of planting, while fertilizer contribution rate showed the opposite trend, and then both of them basically stabled at around 50%. Both of fertilizer contribution rate and agronomic efficiency in OPT treatment were significantly higher than or equal to OPT+N and OPT+P treatments. Fertilization significantly increased N and P runoff loss. Excessive application of N and P fertilizer significantly increased the corresponding N and P loss, but not N (P) fertilizer loss rate. 【Conclusion】 Excessive application of N and P not only had no advantage in sugarcane yield and its stability, but also resulted in waste of resources and increase of nutrient loss. OPT treatment was a better fertilization model for high and stable yield of sugarcane, high fertilizer contribution rate and low nutrient loss. |
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| Keywords: | N fertilizer P fertilizer sugarcane yield stability fertilizer contribution rate nutrient loss |
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