Effects of Planting Density on Yield Components of Fresh Grain Pea

doi:10.11924/j.issn.1000-6850.casb2022-0380

Abstract

Abstract:

To select the best planting density of fresh grain pea ‘Yunwan 18’ in different altitude areas of Yunnan, and provide a basis for good planting practices matching good varieties, the regression model was used to analyze the effects of different planting densities of three altitude areas on fresh grain pea yield and yield components. The results showed that the fitting curves of different planting densities and yield presented a quadratic parabola with the opening downward. The yield first increased with the increase of the planting density, reached the highest when the planting density was at a certain level and the yield remained relatively stable in a certain range of planting density. Then, the fresh grain pea yield decreased with the further increase of the planting density. The planting density for relatively stable yield in the three altitude areas was 330000-420000 plants/hm². The optimum planting density at 1545 m altitude was 420000 plants/hm², that at 1770 m was 330000 plants/hm² and at 1970 m was 375000 plants/hm².

Key words: planting density, fresh grain pea, yield components, effect

LI Yanlan, YANG Jincheng, YU Zonghong, JIN Hongyun, WU Jinhua, LI Xiang, ZHANG Chunfan, WANG Chungui, LIU Jianjian, HU Xinzhou, LUO Zhimin, LI Zaofu, SHI Lanfen, SHEN Xianghong, AN Zhengyun, BAI Yuecai. Effects of Planting Density on Yield Components of Fresh Grain Pea[J]. Chinese Agricultural Science Bulletin, 2023, 39(13): 52-57.

Figures/Tables 8

References 25

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种植密度/(万株/hm²)	E1/(kg/hm²)	E2/(kg/hm²)	E3/(kg/hm²)
24	5670aA	5560.05bB	9407.85bA
28.5	5977.5aA	5685bB	9798abA
33	5745aA	6926.85aA	11020.05abA
37.5	6100aA	6754.5aAB	12122.1aA
42	6300aA	6774.45aA	10667.25abA
46.5	5837.5aA	5712.45bAB	8073.75bA
51	4972.5aA	5475bB	8396.25bA

种植密度/(万株/hm²)	E1/(kg/hm²)	E2/(kg/hm²)	E3/(kg/hm²)
24	5670aA	5560.05bB	9407.85bA
28.5	5977.5aA	5685bB	9798abA
33	5745aA	6926.85aA	11020.05abA
37.5	6100aA	6754.5aAB	12122.1aA
42	6300aA	6774.45aA	10667.25abA
46.5	5837.5aA	5712.45bAB	8073.75bA
51	4972.5aA	5475bB	8396.25bA

海拔/m
1545(E1)	1	24	77.7	20.436	5.5	574	31.57	5670aA
	2	28.5	79.3	23.6115	5.4	562	30.348	5977.5aA
	3	33	74.7	28.4475	4.8	547	26.256	5745aA
	4	37.5	81	33.606	3.8	534	20.292	6100aA
	5	42	79.2	32.862	4	516	20.64	6300aA
	6	46.5	76.2	36.2595	3.6	520	18.72	5837.5aA
	7	51	73.3	37.2525	3.4	508	17.272	4972.5aA
1770(E2)	1	24	77.6	7.64	8.6	788	67.768	5560.05bB
	2	28.5	90.5	10.18	9.7	792	76.824	5685bB
	3	33	97.7	14.18	9.5	776	73.72	6926.85aA
	4	37.5	94.5	13.64	10.3	784	80.752	6754.5aAB
	5	42	95.3	12.09	10.8	770	83.16	6774.45aA
	6	46.5	86.8	7.64	9.3	760	70.68	5712.45bAB
	7	51	95.3	13.37	9.8	751	73.598	5475bB
1970(E3)	1	24	158	18.591	6.9	357	24.633	9407.85bA
	2	28.5	154	16.7925	6.8	367.26	24.97	9798abA
	3	33	159	21.291	6.5	399.95	26.00	11020.05abA
	4	37.5	151	22.4895	6.5	379.44	24.66	12122.1aA
	5	42	149	24.2895	6.2	399.55	24.77	10667.25abA
	6	46.5	150	23.6895	6.3	387.60	24.42	8073.75bA
	7	51	146	23.0895	6.4	383.36	24.54	8396.25bA

海拔/m
1545(E1)	1	24	77.7	20.436	5.5	574	31.57	5670aA
	2	28.5	79.3	23.6115	5.4	562	30.348	5977.5aA
	3	33	74.7	28.4475	4.8	547	26.256	5745aA
	4	37.5	81	33.606	3.8	534	20.292	6100aA
	5	42	79.2	32.862	4	516	20.64	6300aA
	6	46.5	76.2	36.2595	3.6	520	18.72	5837.5aA
	7	51	73.3	37.2525	3.4	508	17.272	4972.5aA
1770(E2)	1	24	77.6	7.64	8.6	788	67.768	5560.05bB
	2	28.5	90.5	10.18	9.7	792	76.824	5685bB
	3	33	97.7	14.18	9.5	776	73.72	6926.85aA
	4	37.5	94.5	13.64	10.3	784	80.752	6754.5aAB
	5	42	95.3	12.09	10.8	770	83.16	6774.45aA
	6	46.5	86.8	7.64	9.3	760	70.68	5712.45bAB
	7	51	95.3	13.37	9.8	751	73.598	5475bB
1970(E3)	1	24	158	18.591	6.9	357	24.633	9407.85bA
	2	28.5	154	16.7925	6.8	367.26	24.97	9798abA
	3	33	159	21.291	6.5	399.95	26.00	11020.05abA
	4	37.5	151	22.4895	6.5	379.44	24.66	12122.1aA
	5	42	149	24.2895	6.2	399.55	24.77	10667.25abA
	6	46.5	150	23.6895	6.3	387.60	24.42	8073.75bA
	7	51	146	23.0895	6.4	383.36	24.54	8396.25bA

	X₁	X₂	X₃	X₄	X₅	X₆	Y	P
X₁	1	-0.4101	0.9884	-1.0221	-0.9596	-1.0595	-0.5259	0.2398
X₂		1	-0.2337	0.1492	0.4191	0.2504	0.6455	0.1702
X₃			1	-1.0574	-0.9996	-1.0726	-0.4606	0.3795
X₄				1	0.9558	1.0333	0.4043	0.4292
X₅					1	0.9569	0.6622	0.1415
X₆						1	0.4723	0.34
Y							1