Nitrogen Effect on Grain Bulging and Its Correlation with Grain Weight of Summer Soybean

doi:10.11923/j.issn.2095-4050.cjas2023-0033

Abstract

Abstract:

To quantitatively analyze the nitrogen effect on grain bulging and its correlation with grain weight of summer soybean, the field fixed-point experiment of different nitrogen application was conducted in 2020 and 2021 summer soybean growing seasons. The variation patterns of 100 grain weight and bulging rate of summer soybeans with bulging days under different nitrogen application levels, as well as the internal relationship between various bulging parameters and grain weight were analyzed systematically, and the nitrogen application effect of summer soybeans and its correlation with grain weight were clarified. The result showed that the 100-grain weight in different treatments showed a “Logistic” curve with the increase of grain bulging days; the grain bulging rate showed a “single peak” curve with the increase of grain bulging days. Excessive or deficient application of nitrogen could shorten the duration of bulging, and the average bulging rate was increased in a certain extent. There was a significant positive correlation between grain weight and the duration of bulging period of summer soybean, and a very significant positive correlation between the duration of fast-growing period and slow-growing period. However, the rate and duration of grain bulging were mainly determined by the rate and duration of grain bulging in the fast and slow growth stages. Nitrogen application could increase the grain weight of summer soybean, but excessive nitrogen application could inhibit the formation of grain weigh. Extending the duration of bulging, especially in the middle and late stages of bulging, was beneficial to the formation of grain weight.

Key words: summer soybean, grain bulging, nitrogen effect, grain weight, correlation

CHEN Yuli, YANG Ping, XU Ran, BI Haibin, GONG Fajiang, WANG Dongfeng, ZHUO Ma, GAO Minghui. Nitrogen Effect on Grain Bulging and Its Correlation with Grain Weight of Summer Soybean[J]. Journal of Agriculture, 2023, 13(12): 28-33.

Figures/Tables 7

References 30

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处理	参数			F
处理	K	a	b	F
N₀	29.111^**	42.823^**	0.164^**	1921.626^**
N₄₀	29.439^**	39.087^**	0.159^**	2795.698^**
N₈₀	29.695^**	38.347^**	0.160^**	1930.461^**
N₁₂₀	30.713^**	37.942^**	0.145^**	1478.788^**
N₁₆₀	31.225^**	32.301^**	0.142^**	1646.751^**
N₂₀₀	30.092^**	46.853^**	0.153^**	7183.554^**
N₂₄₀	30.259^**	36.115^**	0.144^**	1966.358^**
N₂₈₀	28.658^**	46.697^**	0.159^**	691.627^**

处理	参数			F
处理	K	a	b	F
N₀	29.111^**	42.823^**	0.164^**	1921.626^**
N₄₀	29.439^**	39.087^**	0.159^**	2795.698^**
N₈₀	29.695^**	38.347^**	0.160^**	1930.461^**
N₁₂₀	30.713^**	37.942^**	0.145^**	1478.788^**
N₁₆₀	31.225^**	32.301^**	0.142^**	1646.751^**
N₂₀₀	30.092^**	46.853^**	0.153^**	7183.554^**
N₂₄₀	30.259^**	36.115^**	0.144^**	1966.358^**
N₂₈₀	28.658^**	46.697^**	0.159^**	691.627^**

处理	R_max/(g/d)	T_max/d	R/(g/d)	T/d	R₁/(g/d)	R₂/(g/d)	R₃/(g/d)	T₁/d	T₂/d	T₃/d
N₀	1.194	22.902	0.689	42.274	0.414	1.047	0.440	14.874	16.054	11.346
N₄₀	1.167	23.115	0.682	43.154	0.420	1.023	0.430	14.811	16.607	11.736
N₈₀	1.186	22.818	0.695	42.704	0.430	1.040	0.437	14.578	16.480	11.647
N₁₂₀	1.115	25.038	0.655	46.921	0.406	0.978	0.411	15.969	18.135	12.817
N₁₆₀	1.107	24.516	0.665	46.936	0.433	0.970	0.407	15.225	18.580	13.131
N₂₀₀	1.154	25.077	0.657	45.793	0.386	1.012	0.425	16.492	17.168	12.133
N₂₄₀	1.092	24.841	0.646	46.852	0.407	0.958	0.402	15.720	18.241	12.891
N₂₈₀	1.143	24.101	0.651	44.028	0.382	1.002	0.421	15.843	16.514	11.671

处理	R_max/(g/d)	T_max/d	R/(g/d)	T/d	R₁/(g/d)	R₂/(g/d)	R₃/(g/d)	T₁/d	T₂/d	T₃/d
N₀	1.194	22.902	0.689	42.274	0.414	1.047	0.440	14.874	16.054	11.346
N₄₀	1.167	23.115	0.682	43.154	0.420	1.023	0.430	14.811	16.607	11.736
N₈₀	1.186	22.818	0.695	42.704	0.430	1.040	0.437	14.578	16.480	11.647
N₁₂₀	1.115	25.038	0.655	46.921	0.406	0.978	0.411	15.969	18.135	12.817
N₁₆₀	1.107	24.516	0.665	46.936	0.433	0.970	0.407	15.225	18.580	13.131
N₂₀₀	1.154	25.077	0.657	45.793	0.386	1.012	0.425	16.492	17.168	12.133
N₂₄₀	1.092	24.841	0.646	46.852	0.407	0.958	0.402	15.720	18.241	12.891
N₂₈₀	1.143	24.101	0.651	44.028	0.382	1.002	0.421	15.843	16.514	11.671

指标	W	R_max	T_max	R	T	R₁	R₂	R₃	T₁	T₂	T₃
W	1
R_max	-0.662	1
T_max	0.597	-0.816^*	1
R	-0.286	0.827^*	-0.901^**	1
T	0.808^*	-0.927^**	0.931^**	-0.795^*	1
R₁	0.405	0.095	-0.474	0.637	-0.134	1
R₂	-0.662	1.000^**	-0.816^*	0.827^*	-0.927^**	0.095	1
R₃	-0.662	1.000^**	-0.816^*	0.827^*	-0.927^**	0.095	1.000^**	1
T₁	0.217	-0.518	0.890^**	-0.857^**	0.663	-0.804^*	-0.518	-0.518	1
T₂	0.899^**	-0.923^**	0.776^*	-0.624	0.953^**	0.163	-0.923^**	-0.923^**	0.403	1
T₃	0.899^**	-0.923^**	0.776^*	-0.624	0.953^**	0.163	-0.923^**	-0.923^**	0.403	1.000^**	1