Effects of Phosphorus Fertilizer Application Rate on Grain Yield, Phosphorus Accumulation and Utilization of Direct-seeded Rice in Hubei Province

doi:10.16819/j.1001-7216.2025.240512

Chinese Journal OF Rice Science ›› 2025, Vol. 39 ›› Issue (3): 399-411.DOI: 10.16819/j.1001-7216.2025.240512

• Research Papers • Previous Articles Next Articles

Effects of Phosphorus Fertilizer Application Rate on Grain Yield, Phosphorus Accumulation and Utilization of Direct-seeded Rice in Hubei Province

SHEN Zhida¹, YU Qiuhua², ZHANG Bin³, CAO Yudong¹, WANG Shaohua⁴, WANG Hongfei⁵, WU Yongqing⁶, DAI Zhigang², LI Xiaokun¹^,⁷^,^*()

¹College of Resources and Environment, Huazhong Agricultural University / Key Laboratory of Arable Land Conservation (Middle and Lower Reaches of Yangtze River) of Ministry of Agriculture and Rural Affairs / Microelement Research Center, Huazhong Agricultural University, Wuhan 430070, China
²Hubei Provincial General Station of Arable Land Quality and Fertilizer, Wuhan 430070, China
³Cultivated Land Quality Protection and Monitoring Center of Yiling District, Yichang 443199, China
⁴Agricultural and Rural Bureau of Wuxue City, Hubei Province, Wuxue 435401, China
⁵Cultivated Land Quality Protection and Fertilizer Administration of Tuanfeng County, Tuanfeng 438899, China
⁶Soil and Fertilizer Work Station of Shayang City, Shayang 448200, China
⁷Shuangshui Shuanglü Institute, Huazhong Agricultural University, Wuhan 430070, China

Received:2024-05-24 Revised:2024-09-26 Online:2025-05-10 Published:2025-05-21
Contact: *email：lixiaokun@mail.hzau.edu.cn

磷肥施用量对湖北省直播水稻产量、磷素积累及利用率的影响

沈智达¹, 余秋华², 张斌³, 曹玉东¹, 王少华⁴, 王红飞⁵, 伍永清⁶, 戴志刚², 李小坤¹^,⁷^,^*()

¹华中农业大学资源与环境学院/农业农村部长江中下游耕地保育重点实验室/华中农业大学微量元素研究中心，武汉 430070
²湖北省耕地质量与肥料工作总站，武汉 430070
³宜昌市夷陵区耕地质量保护监测中心, 湖北宜昌 443199
⁴湖北省武穴市农业农村局，湖北武穴 435401
⁵湖北省团风县耕地质量保护与肥料管理局，湖北团风 438899
⁶湖北省沙洋县土壤肥料工作站，湖北沙洋 448200
⁷华中农业大学双水双绿研究院，武汉 430070

通讯作者: *email：lixiaokun@mail.hzau.edu.cn
基金资助:
湖北省现代农业水稻产业技术体系项目(2023HBSTX4-01);湖北洪山实验室重大项目(2121hsz002);湖北省重点研发计划资助项目(2022BBA0048)

Abstract

Abstract:

【Objective】This study aims to clarify the effect of phosphorus fertilizer dosage on grain yield, phosphorus accumulation, phosphorus fertilizer utilization, and economic benefits of direct-seeded rice in Hubei Province. It provides a theoretical basis for the scientific fertilization of direct-seeded rice in the region.【Methods】Four phosphorus fertilizer application rates (0, 45, 90, and 135 kg/hm²)were established in a multi-site experiment across counties (cities and districts) in the major rice-producing areas of Hubei Province. The grain yield, phosphorus content, phosphorus accumulation, phosphorus fertilizer utilization, and economic benefits of rice under different phosphorus fertilizer dosages were comparatively analyzed.【Results】Compared to the zero phosphorus treatment (0 kg/hm²), the phosphorus fertilizer dosages of 45, 90, and 135 kg/hm² at each experimental site increased the grain yield by 0.18−1.80 t/hm², 0.30−3.24 t/hm², and 0.60−2.61 t/hm², respectively, with average increases of 9.15%, 16.08%, and 18.24%.Additionally, the aboveground phosphorus accumulation of rice increased by 1.57−9.18 kg/hm², 2.67−12.77 kg/hm², and 4.16−15.06 kg/hm², with average increases of 29.14%, 44.92%, and 53.60%, respectively. Overall, rice yield increased with the phosphorus fertilizer dosage in the range of 0−90 kg/hm², and there was no significant difference in rice yield when the phosphorus fertilizer dosage exceeded 90 kg/hm².With the increase in phosphorus fertilizer dosage, rice phosphorus accumulation, production value, and net income followed a trend of increasing and then stabilizing, while partial productivity of phosphate fertilizer, agronomic utilization rate, recycling rate, and production-to-input ratio decreased with higher phosphorus fertilizer dosages. An interaction was observed between phosphorus fertilizer dosage and experimental location regarding yield, phosphorus accumulation, phosphorus fertilizer utilization, production value, and net income of direct-seeded rice.【Conclusion】Appropriate phosphorus fertilizer dosage can significantly improve the grain yield, aboveground phosphorus accumulation, and phosphorus fertilizer utilization of direct-seeded rice. Considering yield, phosphorus accumulation, fertilizer utilization, and economic benefits, the recommended dosage of phosphorus fertilizer for direct-seeded rice in Hubei Province is 58−104 kg/hm², with an average of 82 kg/hm². The theoretical maximum yield can reach 6.97−12.18 t/hm², with an average of 9.14t/hm², which can ensure rice yield while minimizing nutrient loss and reducing environmental pollution.

Key words: direct-seeded rice, phosphorus fertilizer dosage, yield, phosphorus accumulation, fertilizer utilization, economic benefits

摘要：

【目的】明确磷肥用量对湖北省直播水稻产量、磷素积累、磷肥利用率及经济效益的影响，为湖北省直播水稻的科学施肥提供理论依据。【方法】在湖北省水稻主产区的县(市、区)采用多点试验，设置0、45、90、135 kg/hm² 4个磷肥用量处理。对比分析了不同磷肥用量下水稻的产量、磷素含量、磷素积累量、磷肥利用率和经济效益。【结果】与不施磷(0 kg/hm²)处理相比，各试验点磷肥用量为45、90、135 kg/hm²处理分别增产0.18~1.80 t/hm²、0.30~3.24 t/hm²和0.60~2.61 t/hm²，平均增幅分别为9.15%、16.08%和18.24%，水稻地上部磷素积累量分别增加了1.57~9.18 kg/hm²、2.67~12.77 kg/hm²、4.16~15.06 kg/hm²，平均增幅分别为29.14%、44.92%、53.60%。整体而言，磷肥用量在0−90 kg /hm²范围内，水稻产量随磷肥用量的增加而增加，磷肥用量超过90 kg/hm²时水稻产量无显著差异。随着磷肥用量的增加水稻磷素积累量、产值和纯收入呈现先增加后保持不变的趋势，而磷肥偏生产力、磷肥农学利用率、磷肥回收利用率和产投比随磷肥用量的增加而下降。磷肥用量和试验地点对直播水稻产量、秸秆磷素含量、秸秆磷素积累量、磷肥偏生产力、磷肥农学利用率、磷肥回收利用率、产值、纯收入和产投比的影响均存在交互作用。【结论】适宜的磷肥用量可以显著提高直播水稻产量、地上部磷素积累量和磷肥利用率。综合考虑产量、磷素积累、肥料利用率和经济效益，湖北省直播水稻磷肥推荐用量为58~104 kg/hm²，平均为82 kg/hm²，理论最高产量可达6.97~12.18 t/hm²，平均为9.14 t/hm²能够保障水稻产量的同时能减少养分损失和环境污染。

关键词: 直播水稻, 磷肥用量, 产量, 磷素积累, 肥料利用率, 经济效益

SHEN Zhida, YU Qiuhua, ZHANG Bin, CAO Yudong, WANG Shaohua, WANG Hongfei, WU Yongqing, DAI Zhigang, LI Xiaokun. Effects of Phosphorus Fertilizer Application Rate on Grain Yield, Phosphorus Accumulation and Utilization of Direct-seeded Rice in Hubei Province[J]. Chinese Journal OF Rice Science, 2025, 39(3): 399-411.

沈智达, 余秋华, 张斌, 曹玉东, 王少华, 王红飞, 伍永清, 戴志刚, 李小坤. 磷肥施用量对湖北省直播水稻产量、磷素积累及利用率的影响[J]. 中国水稻科学, 2025, 39(3): 399-411.

Figures/Tables 9

References 33

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试验地点 Experimental site	经纬度 Longitude and latitude	水稻品种 Rice variety	播种量 Seeding rate(kg/hm²)	土壤基础理化性质 Soil physical and chemical properties
试验地点 Experimental site	经纬度 Longitude and latitude	水稻品种 Rice variety	播种量 Seeding rate(kg/hm²)	pH值 pH value	有机质 Organic matter (g/kg)	全氮 Total nitrogen (g/kg)	速效磷 Available phosphorus (mg/kg)	速效钾 Available potassium (mg/kg)
潜江 Qianjiang	30°27′N, 112°37′E	荃两优2118 Quanliangyou 2118	36.0	6.89	20.26	1.52	10.60	97.52
团风 Tuanfeng	30°39′N, 114°52′E	华珍115 Huazhen 115	60.0	5.70	28.40	1.33	15.35	98.21
大悟 Dawu	31°58′N, 120°32′E	隆两优3463 Longliangyou 3463	37.5	8.13	28.51	2.34	16.75	73.97
夷陵 Yiling	30°38′N, 111°36′E	荃两优丝苗 Quanliangyousimiao	45.0	6.10	21.50	1.65	23.20	115.13
襄州 Xiangzhou	32°04′N, 112°12′E	粤禾丝苗 Yuehesimiao	66.0	6.27	26.06	1.49	23.81	83.17
武穴 Wuxue	29°51′N, 115°33′E	黄华占 Huanghuazhan	75.0	6.63	25.46	1.62	12.20	163.69
鄂州-1 Ezhou-1	30°04′N, 114°40′E	鄂优丝苗 Eyousimiao	75.0	7.60	19.02	1.11	22.55	90.07
鄂州-2 Ezhou-2	30°25′N, 114°44′E	黄花粘 Huanghuazhan	75.0	6.72	22.29	1.68	29.45	130.93
天门 Tianmen	30°39′N, 113°01′E	粤农丝苗 Yuenongsimiao	60.0	7.57	18.54	1.33	34.20	183.20
沙洋 Shayang	31°02′N, 112°12′E	青香优香九 Qingxiangyouxiangjiu	37.5	8.10	22.06	1.19	17.38	187.97

试验地点 Experimental site	经纬度 Longitude and latitude	水稻品种 Rice variety	播种量 Seeding rate(kg/hm²)	土壤基础理化性质 Soil physical and chemical properties
试验地点 Experimental site	经纬度 Longitude and latitude	水稻品种 Rice variety	播种量 Seeding rate(kg/hm²)	pH值 pH value	有机质 Organic matter (g/kg)	全氮 Total nitrogen (g/kg)	速效磷 Available phosphorus (mg/kg)	速效钾 Available potassium (mg/kg)
潜江 Qianjiang	30°27′N, 112°37′E	荃两优2118 Quanliangyou 2118	36.0	6.89	20.26	1.52	10.60	97.52
团风 Tuanfeng	30°39′N, 114°52′E	华珍115 Huazhen 115	60.0	5.70	28.40	1.33	15.35	98.21
大悟 Dawu	31°58′N, 120°32′E	隆两优3463 Longliangyou 3463	37.5	8.13	28.51	2.34	16.75	73.97
夷陵 Yiling	30°38′N, 111°36′E	荃两优丝苗 Quanliangyousimiao	45.0	6.10	21.50	1.65	23.20	115.13
襄州 Xiangzhou	32°04′N, 112°12′E	粤禾丝苗 Yuehesimiao	66.0	6.27	26.06	1.49	23.81	83.17
武穴 Wuxue	29°51′N, 115°33′E	黄华占 Huanghuazhan	75.0	6.63	25.46	1.62	12.20	163.69
鄂州-1 Ezhou-1	30°04′N, 114°40′E	鄂优丝苗 Eyousimiao	75.0	7.60	19.02	1.11	22.55	90.07
鄂州-2 Ezhou-2	30°25′N, 114°44′E	黄花粘 Huanghuazhan	75.0	6.72	22.29	1.68	29.45	130.93
天门 Tianmen	30°39′N, 113°01′E	粤农丝苗 Yuenongsimiao	60.0	7.57	18.54	1.33	34.20	183.20
沙洋 Shayang	31°02′N, 112°12′E	青香优香九 Qingxiangyouxiangjiu	37.5	8.10	22.06	1.19	17.38	187.97

F值 F value	产量 Yield	籽粒磷素含量 Seed phosphorus content	秸秆磷素含量 Straw phosphorus content	籽粒磷素积累量 Seed phosphorus accumulation	秸秆磷素积累量 Straw phosphorus accumulation
地点Site(S)	920.27**	29.81**	111.56**	65.41**	86.68**
磷肥用量Phosphorus fertilizer level(P)	357.97**	28.50**	20.98**	72.33**	83.04**
S×P	10.69**	0.83ns	3.09**	1.15ns	3.62**
F值 F value	磷肥偏生产力 Partial productivity of phosphate fertilizer	磷肥农学利用率Agronomic utilization of phosphate fertilizer	磷肥回收利用率Recovery rate of phosphate fertilizer	磷肥生理利用率 Phosphorus fertilizer physiological utilization	磷素收获指数Phosphorus harvest index
地点Site(S)	590.17**	51.10**	15.81**	8.89**	14.58**
磷肥用量Phosphorus fertilizer level(P)	18827.46**	23.48**	45.21**	0.86ns	1.89ns
S×P	67.82**	4.09**	2.72*	1.37ns	1.50ns
F值 F value	产值 Output	施磷肥增加产值 Increased production value	纯收入 Net income	产投比 Fertilizer output−input ratio
地点Site(S)	920.27**	49.49**	920.27**	886.52**
磷肥用量Phosphorus fertilizer level(P)	357.97**	73.31**	210.90**	702.06**
S×P	10.69**	3.45**	10.69**	19.04**

F值 F value	产量 Yield	籽粒磷素含量 Seed phosphorus content	秸秆磷素含量 Straw phosphorus content	籽粒磷素积累量 Seed phosphorus accumulation	秸秆磷素积累量 Straw phosphorus accumulation
地点Site(S)	920.27**	29.81**	111.56**	65.41**	86.68**
磷肥用量Phosphorus fertilizer level(P)	357.97**	28.50**	20.98**	72.33**	83.04**
S×P	10.69**	0.83ns	3.09**	1.15ns	3.62**
F值 F value	磷肥偏生产力 Partial productivity of phosphate fertilizer	磷肥农学利用率Agronomic utilization of phosphate fertilizer	磷肥回收利用率Recovery rate of phosphate fertilizer	磷肥生理利用率 Phosphorus fertilizer physiological utilization	磷素收获指数Phosphorus harvest index
地点Site(S)	590.17**	51.10**	15.81**	8.89**	14.58**
磷肥用量Phosphorus fertilizer level(P)	18827.46**	23.48**	45.21**	0.86ns	1.89ns
S×P	67.82**	4.09**	2.72*	1.37ns	1.50ns
F值 F value	产值 Output	施磷肥增加产值 Increased production value	纯收入 Net income	产投比 Fertilizer output−input ratio
地点Site(S)	920.27**	49.49**	920.27**	886.52**
磷肥用量Phosphorus fertilizer level(P)	357.97**	73.31**	210.90**	702.06**
S×P	10.69**	3.45**	10.69**	19.04**

试验地点 Experimental site	磷肥用量 Phosphorus fertilizer application rate
试验地点 Experimental site	0 kg/hm²	45 kg/hm²	90 kg/hm²	135 kg/hm²
潜江 Qianjiang	5.92±0.37 c	7.31±0.37 b	8.57±0.45 a	8.37±0.27 a
团风 Tuanfeng	9.88±0.08 c	10.30±0.02 b	10.69±0.08 a	10.81±0.08 a
大悟 Dawu	5.53±0.21 c	6.18±0.23 b	6.87±0.21 a	7.08±0.07 a
夷陵 Yiling	8.47±0.19 c	9.76±0.23 b	10.25±0.16 a	10.03±0.24 ab
襄州 Xiangzhou	9.07±0.12 d	9.33±0.10 c	9.64±0.01 b	10.17±0.11 a
武穴 Wuxue	8.21±0.33 d	8.88±0.15 c	9.45±0.06 b	10.23±0.30 a
鄂州-1 Ezhou-1	6.45±0.04 c	7.08±0.07 b	7.34±0.04 a	7.28±0.09 a
鄂州-2 Ezhou-2	7.89±0.05 c	8.39±0.06 b	8.55±0.03 ab	8.77±0.06 a
天门 Tianmen	10.43±0.08 c	11.21±0.06 b	11.97±0.24 a	12.18±0.13 a
沙洋 Shayang	8.92±0.03 c	9.11±0.04 bc	9.23±0.03 ab	9.57±0.03 a
平均值 Average	8.08±1.60 b	8.75±1.49 ab	9.26±1.48 a	9.45±1.54 a

Effects of Phosphorus Fertilizer Application Rate on Grain Yield, Phosphorus Accumulation and Utilization of Direct-seeded Rice in Hubei Province

磷肥施用量对湖北省直播水稻产量、磷素积累及利用率的影响

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部位 Position	施磷量 Phosphorus application rates(kg/hm²)	平均值 Mean	标准偏差 Standard deviation	最小值 Minimum	1/4位点 First quartile	中位数 Median	3/4位点 Third quartile	最大值 Maximum
籽粒 Seed	0	0.18 b	0.04	0.11	0.14	0.18	0.21	0.25
	45	0.21 a	0.03	0.15	0.18	0.21	0.24	0.27
	90	0.22 a	0.04	0.16	0.19	0.22	0.26	0.28
	135	0.23 a	0.04	0.16	0.19	0.24	0.26	0.29
秸秆 Straw	0	0.11 a	0.06	0.01	0.05	0.10	0.15	0.24
	45	0.12 a	0.07	0.01	0.06	0.12	0.17	0.24
	90	0.13 a	0.07	0.02	0.07	0.13	0.17	0.25
	135	0.13 a	0.07	0.05	0.07	0.12	0.19	0.28

试验地点 Experimental site	施磷量 Phosphorus application(kg/hm²)	磷肥偏生产力 Partial productivity of phosphate fertilizer(kg/kg)	磷肥农学利用率 Agronomic utilization of phosphate fertilizer(kg/kg)	磷肥回收利用率 Recovery rate of phosphate fertilizer(%)	磷肥生理利用率 Phosphorus fertilizer physiological utilization(kg/kg)	磷素收获指数 Phosphorus harvest index(%)
潜江	0	-	-	-	-	0.50±0.02 a
Qianjiang	45	162.44±8.28 a	30.98±9.35 a	36.31±5.49 a	70.59±13.74 a	0.61±0.01 a
	90	95.26±5.04 b	29.52±6.42 a	25.61±4.24 b	137.87±86.06 a	0.73±0.24 a
	135	61.97±1.97 c	18.14±0.92 a	21.72±1.05 b	101.64±60.04 a	0.60±0.09 a
团风	0	-	-	-	-	0.62±0.04 a
Tuanfeng	45	228.85±0.36 a	9.30±1.80 a	33.46±3.06 a	28.09±7.24 a	0.64±0.00 a
	90	118.81±0.86 b	9.04±1.51 a	26.56±2.20 b	33.96±3.85 a	0.66±0.03 a
	135	80.04±0.62 c	6.85±1.11 a	18.75±1.94 c	36.41±2.20 a	0.62±0.03 a
大悟	0	-	-	-	-	0.48±0.01 b
Dawu	45	137.41±5.01 a	14.44±1.11 a	28.29±5.84 a	52.15±8.04 a	0.53±0.01 a
	90	76.30±2.31 b	14.81±3.21 a	24.49±6.70 a	61.28±5.98 a	0.53±0.02 a
	135	52.43±0.50 c	11.44±1.43 a	21.89±3.47 a	53.20±10.59 a	0.49±0.03 b
夷陵	0	-	-	-	-	0.65±0.01 a
Yiling	45	216.88±5.05 a	28.75±0.76 a	31.43±5.84 a	84.14±11.66 a	0.65±0.03 a
	90	113.91±1.77 b	19.84±0.65 b	23.15±1.17 b	78.17±4.36 a	0.66±0.02 a
	135	74.27±1.80 c	11.57±3.22 c	21.21±1.52 b	50.78±10.09 b	0.63±0.01 a
襄州	0	-	-	-	-	0.67±0.04 c
Xiangzhou	45	207.28±2.26 a	5.65±1.04 b	31.39±7.30 a	18.75±6.06 b	0.68±0.02 ab
	90	107.15±0.06 b	6.33±1.37 ab	25.69±6.59 ab	25.31±6.00 b	0.61±0.02 b
	135	75.33±0.78 c	8.12±0.95 a	14.03±5.68 b	65.17±27.83 a	0.73±0.01 a
武穴	0	-	-	-	-	0.52±0.02 a
Wuxue	45	197.33±3.33 a	14.92±4.06 a	18.96±2.48 a	79.54±14.89 a	0.49±0.01 a
	90	104.95±0.68 b	13.75±3.97 a	19.00±3.87 a	76.05±10.71 a	0.49±0.11 a
	135	75.75±2.22 c	14.94±4.46 a	19.44±2.98 a	77.09±12.26 a	0.54±0.02 a
鄂州-1	0	-	-	-	-	0.61±0.05 a
Ezhou-1	45	157.30±1.47 a	13.89±2.01 a	15.86±1.07 a	79.39±7.29 a	0.61±0.05 a
	90	81.52±0.42 b	9.82±0.90 b	16.06±0.83 a	57.28±7.08 b	0.61±0.02 a
	135	53.92±0.67 c	6.11±0.81 b	8.74±1.59 b	66.07±10.17 ab	0.61±0.03 a
鄂州-2	0	-	-	-	-	0.50±0.04 a
Ezhou-2	45	186.51±1.25 a	11.21±1.16 a	39.57±2.37 a	28.43±3.62 a	0.53±0.04 a
	90	95.05±0.28 b	7.40±0.33 ab	20.76±3.50 b	36.35±6.41 a	0.55±0.06 a
	135	64.99±0.45 c	6.56±0.10 b	19.27±5.69 b	36.46±9.43 a	0.51±0.04 a
天门	0	-	-	-	-	0.56±0.02 a
Tianmen	45	249.07±1.40 a	17.22±0.56 a	36.21±9.27 a	49.73±9.81 a	0.56±0.05 a
	90	133.01±2.62 b	17.09±3.27 a	29.89±2.81 ab	57.93±10.6 a	0.56±0.03 a
	135	90.19±0.95 c	12.91±0.88 b	21.05±1.81 b	61.79±8.69 a	0.58±0.04 a
沙洋	0	-	-	-	-	0.56±0.03 a
Shayang	45	202.55±0.91 a	4.40±0.31 a	10.61±2.48 a	39.28±9.96 a	0.59±0.02 a
	90	102.59±0.32 b	3.52±0.32 a	9.37±2.81 a	36.75±9.77 a	0.59±0.03 a
	135	70.86±0.21 c	4.81±0.37 a	9.77±1.41 a	44.90±8.19 a	0.58±0.05 a

试验地点 Experimental site	施磷量 Phosphorus application (kg/hm²)	产值 Output (×10³ Yuan/hm²)	施磷肥增加产值 Increased production value (×10³ Yuan/hm²)	施肥成本 Fertilization cost (×10³ Yuan/hm²)	纯收入 Net income (×10³ Yuan/hm²)	产投比 Fertilizer output−input ratio(%)
潜江	0	16.57±1.03 c	0	1.31	14.56±1.03 c	8.24±0.51 a
Qianjiang	45	20.47±1.04 b	3.90±1.18 b	1.63	18.14±1.04 b	8.78±0.45 a
	90	24.01±1.27 a	7.44±1.62 a	1.95	21.36±1.27 a	9.06±0.48 a
	135	23.42±0.74 a	6.86±0.35 a	2.27	20.45±0.74 a	7.89±0.25 b
团风	0	27.66±0.22 c	0	1.31	25.65±0.22 c	13.76±0.11 a
Tuanfeng	45	28.84±0.05 b	1.17±0.23 b	1.63	26.51±0.05 b	12.38±0.02 b
	90	29.94±0.22 a	2.28±0.38 a	1.95	27.29±0.22 a	11.30±0.08 c
	135	30.25±0.23 a	2.59±0.42 a	2.27	27.28±0.23 a	10.19±0.08 d
大悟	0	15.49±0.58 c	0	1.31	13.48±0.58 c	7.71±0.29 a
Dawu	45	17.31±0.63 b	1.82±0.14 b	1.63	14.98±0.63 b	7.43±0.27 b
	90	19.23±0.58 a	3.73±0.81 a	1.95	16.58±0.58 a	7.26±0.22 c
	135	19.82±0.19 a	4.33±0.54 a	2.27	16.85±0.19 a	6.67±0.06 d
夷陵	0	23.70±0.54 c	0	1.31	21.69±0.54 b	11.79±0.27 a
Yiling	45	27.33±0.64 b	3.62±0.10 a	1.63	25.00±0.64 a	11.73±0.27 b
	90	28.70±0.44 a	5.00±0.16 a	1.95	26.05±0.44 a	10.83±0.17 c
	135	28.08±0.68 ab	4.37±1.22 a	2.27	25.11±0.68 a	9.45±0.23 d
襄州	0	25.41±0.34 d	0	1.31	23.40±0.34 d	12.64±0.17 a
Xiangzhou	45	26.12±0.28 c	0.71±0.13 c	1.63	23.79±0.28 c	11.21±0.12 b
	90	27.00±0.02 b	1.60±0.35 b	1.95	24.35±0.02 b	10.19±0.01 c
	135	28.47±0.30 a	3.07±0.06 a	2.27	25.50±0.30 a	9.59±0.10 d
武穴	0	22.98±0.92 d	0	1.31	20.97±0.92 d	11.43±0.46 a
Wuxue	45	24.86±0.42 c	1.88±0.51 b	1.63	22.53±0.42 c	10.67±0.18 b
	90	26.45±0.17 b	3.46±1.00 ab	1.95	23.80±0.17 b	9.98±0.06 c
	135	28.63±0.84 a	5.65±1.68 a	2.27	25.66±0.84 a	9.64±0.28 d
鄂州-1	0	18.07±0.12 c	0	1.31	16.06±0.12 b	8.99±0.06 a
Ezhou-1	45	19.82±0.19 b	1.75±0.25 b	1.63	17.49±0.19 a	8.51±0.08 b
	90	20.54±0.11 a	2.47±0.23 a	1.95	17.89±0.11 a	7.75±0.04 c
	135	20.38±0.25 a	2.31±0.31 a	2.27	17.41±0.25 a	6.86±0.08 d
鄂州-2	0	22.09±0.15 d	0	1.31	20.08±0.15 d	10.99±0.07 a
Ezhou-2	45	23.50±0.16 c	1.41±0.15 b	1.63	21.17±0.16 c	10.09±0.07 b
	90	23.95±0.07 b	1.87±0.08 a	1.95	21.30±0.07 b	9.04±0.03 c
	135	24.57±0.17 a	2.48±0.04 a	2.27	21.60±0.17 a	8.27±0.06 d
天门	0	29.21±0.21 c	0	1.31	27.20±0.21 c	14.53±0.11 a
Tianmen	45	31.38±0.18 b	2.17±0.07 b	1.63	29.05±0.18 b	13.47±0.08 b
	90	33.52±0.66 a	4.31±0.82 a	1.95	30.87±0.66 a	12.65±0.25 c
	135	34.09±0.36 a	4.88±0.33 a	2.27	31.12±0.36 a	11.48±0.12 d
沙洋	0	24.97±0.08 d	0	1.31	22.96±0.08 c	12.42±0.04 a
Shayang	45	25.52±0.11 c	0.55±0.04 c	1.63	23.19±0.11 b	10.95±0.05 b
	90	25.85±0.08 b	0.89±0.08 b	1.95	23.20±0.08 b	9.76±0.03 c
	135	26.79±0.08 a	1.82±0.14 a	2.27	23.82±0.08 a	9.02±0.03 d

试验地点 Experimental site	肥料效应方程 Fertilizer effect equation	相关系数 Coefficient	磷肥推荐用量 Recommended amount of phosphate fertilizer(kg/hm²)	理论产量 Theoretical yield(t/hm²)
潜江 Qianjiang	y=0.031x+5.916(x≤82) y=8.366(x>82)	0.919^**	82	8.37
团风 Tuanfeng	y=0.009x+9.88(x≤101) y=10.749(x>101)	0.976^**	97	10.75
大悟 Dawu	y=0.014x +5.533(x≤104) y =6.972(x>104)	0.939^**	104	6.98
夷陵 Yiling	y =0.029x +8.466(x≤58) y =10.027(x>58)	0.930^**	58	10.03
襄州 Xiangzhou	y =0.00752x +8.967	0.930^*	-	-
武穴 Wuxue	y =0.01377x +8.219	0.989^**	-	-
鄂州-1 Ezhou-1	y =0.014x +6.453(x≤62) y =7.279(x>62)	0.975^**	62	7.28
鄂州-2 Ezhou-2	y =0.011x +7.888(x≤70) y =8.664(x>70)	0.774^**	70	8.66
天门 Tianmen	y =0.016x +10.433(x≤103) y =12.176(x>103)	0.969^**	103	12.18
沙洋 Shayang	y =0.00461x +8.895	0.959^**	-	-

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