Effects of potassium application rate on chlorophyll fluorescence characteristics and yield of spring maize in Ningxia under integrated drip irrigation

doi:10.3969/j.issn.1004-1524.2021.08.01

Acta Agriculturae Zhejiangensis ›› 2021, Vol. 33 ›› Issue (8): 1347-1357.DOI: 10.3969/j.issn.1004-1524.2021.08.01

• Crop Science • Previous Articles Next Articles

Effects of potassium application rate on chlorophyll fluorescence characteristics and yield of spring maize in Ningxia under integrated drip irrigation

WANG Jia(), MU Ruirui, YANG Qiaoqiao, LIU Wei, ZHANG Yuehe, KANG Jianhong^*()

School of Agriculture, Ningxia University, Yinchuan 750021, China

Received:2021-06-12 Online:2021-08-25 Published:2021-08-27
Contact: KANG Jianhong

Abstract

Abstract:

Through two-year field experiments in 2018-2019, the effects of different potassium application rates on the chlorophyll fluorescence characteristics and yield of Ningxia spring maize were studied. Using Tianci 19 as the test material, a random block test design was adopted, with six gradient potassium fertilizer treatments, K0 (0 kg·hm^-2), K1 (60 kg·hm^-2), K2 (120 kg·hm^-2), K3 (180 kg·hm^-2), K4 (240 kg·hm^-2), K5 (300 kg·hm^-2).The results showed that potassium fertilizer can enhance the fluorescence characteristics of maize and increase the yield of spring maize in Ningxia. When potassium was applied at 180 kg·hm^-2, SPAD, maximum fluorescence(F_m), potential activity of PSⅡ(F_v/F_o), the primary maximum photochemical efficiency of PSⅡ(F_v/F_m), PSⅡcomprehensive performance index(PI), light energy absorbed by unit reaction center (ABS/RC) and other indicators all reached the optimum. In the range of 0-180 kg·hm^-2, the yield of maize increased with the increase of potassium application. When the amount of potassium application exceeded 180 kg·hm^-2, the yield of spring maize began to decline.Correlation analysis showed that the yield was related to SPAD, F_m, minimum fluorescence (F_o), F_v/F_o, F_v/F_m, PI, ABS/RC, which showed different degrees of positive correlation. Therefore, the best application amount of potassium was 180 kg·hm ^-2.

Key words: maize, chlorophyll content, chlorophyll fluorescence parameters, yield

CLC Number:

S513

WANG Jia, MU Ruirui, YANG Qiaoqiao, LIU Wei, ZHANG Yuehe, KANG Jianhong. Effects of potassium application rate on chlorophyll fluorescence characteristics and yield of spring maize in Ningxia under integrated drip irrigation[J]. Acta Agriculturae Zhejiangensis, 2021, 33(8): 1347-1357.

Figures/Tables 11

References 25

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钾肥用量及灌水量 Amount of potash fertilizer and irrigation	苗期 Seedling stage	拔节期 Jointing stage			抽雄-吐丝期 Anthesis silking stage		灌浆期 Filling stage			成熟期 Mature stage
硫酸钾Potassium sulphate(K0)/(kg·hm^-2)	0	0	0	0	0	/	0	0	0	/
硫酸钾Potassium sulphate(K1)/(kg·hm^-2)	6	8.08	8.08	8.08	8.76	/	7	7	7	/
硫酸钾Potassium sulphate(K2)/(kg·hm^-2)	12	16.16	16.16	16.16	17.52	/	14	14	14	/
硫酸钾Potassium sulphate(K3)/(kg·hm^-2)	18	24.24	24.24	24.24	26.28	/	21	21	21	/
硫酸钾Potassium sulphate(K4)/(kg·hm^-2)	24	32.32	32.32	32.32	35.04	/	28	28	28	/
硫酸钾Potassium sulphate(K5)/(kg·hm^-2)	30	40.4	40.4	40.4	43.8	/	35	35	35	/
灌水量Irrigation amount/(m³·hm^-2)	195	240	240	240	270	270	270	270	270	210

钾肥用量及灌水量 Amount of potash fertilizer and irrigation	苗期 Seedling stage	拔节期 Jointing stage			抽雄-吐丝期 Anthesis silking stage		灌浆期 Filling stage			成熟期 Mature stage
硫酸钾Potassium sulphate(K0)/(kg·hm^-2)	0	0	0	0	0	/	0	0	0	/
硫酸钾Potassium sulphate(K1)/(kg·hm^-2)	6	8.08	8.08	8.08	8.76	/	7	7	7	/
硫酸钾Potassium sulphate(K2)/(kg·hm^-2)	12	16.16	16.16	16.16	17.52	/	14	14	14	/
硫酸钾Potassium sulphate(K3)/(kg·hm^-2)	18	24.24	24.24	24.24	26.28	/	21	21	21	/
硫酸钾Potassium sulphate(K4)/(kg·hm^-2)	24	32.32	32.32	32.32	35.04	/	28	28	28	/
硫酸钾Potassium sulphate(K5)/(kg·hm^-2)	30	40.4	40.4	40.4	43.8	/	35	35	35	/
灌水量Irrigation amount/(m³·hm^-2)	195	240	240	240	270	270	270	270	270	210

年份 Year	处理 Treatment	产量 Yield/ (kg·hm^-2)	穗数 Spike number/ (ind·hm^-2)	穗行数 Kernel-row number per ear	行粒数 Number of kernels per row	百粒重 Weight of 100-kernel/g
2018	K0	14 819.0±32.98 a	95 295±414 a	15.06±0.31 a	31.45±0.88 a	34.53±1.58 a
	K1	15 666.2±85.10 a	95 890±273 a	15.00±0.24 a	32.60±1.41 a	35.26±1.25 a
	K2	15 680.1±102.39 a	96 350±1 708 a	14.80±0.14 a	31.95±3.30 a	36.61±0.95 a
	K3	16 231.1±42.06 a	97 105±185 a	15.13±0.18 a	32.21±0.92 a	36.70±0.65 a
	K4	16 053.1±34.49 a	96 390±851 a	15.40±0.15 a	31.83±0.87 a	36.11±1.44 a
	K5	15 548.6±10.98 a	96 145±1 399 a	15.20±0.48 a	32.77±1.27 a	34.42±0.61 a
2019	K0	15 892.7±32.27 b	95 040±754 b	17.07±0.36 a	31.67±0.75 ab	34.68±1.10 b
	K1	15 951.8±99.58 ab	95 785±737 ab	16.80±0.96 a	31.70±01.53 ab	35.57±1.39 ab
	K2	16 585.9±41.54 ab	95 880±853 ab	17.07±0.35 a	31.13±0.89 ab	36.24±1.00 ab
	K3	16 806.9±72.06 a	97 595±995 a	17.00±0.46 a	31.57±1.14 a	36.75±0.31 a
	K4	16 096.2±44.37 ab	96 550±1 400 ab	17.00±0.36 a	30.13±0.29 b	36.87±0.97 a
	K5	15 990.3±74.78 ab	96 080±355 ab	17.13±1.13 a	31.73±1.46 ab	34.37±1.48 b

年份 Year	处理 Treatment	产量 Yield/ (kg·hm^-2)	穗数 Spike number/ (ind·hm^-2)	穗行数 Kernel-row number per ear	行粒数 Number of kernels per row	百粒重 Weight of 100-kernel/g
2018	K0	14 819.0±32.98 a	95 295±414 a	15.06±0.31 a	31.45±0.88 a	34.53±1.58 a
	K1	15 666.2±85.10 a	95 890±273 a	15.00±0.24 a	32.60±1.41 a	35.26±1.25 a
	K2	15 680.1±102.39 a	96 350±1 708 a	14.80±0.14 a	31.95±3.30 a	36.61±0.95 a
	K3	16 231.1±42.06 a	97 105±185 a	15.13±0.18 a	32.21±0.92 a	36.70±0.65 a
	K4	16 053.1±34.49 a	96 390±851 a	15.40±0.15 a	31.83±0.87 a	36.11±1.44 a
	K5	15 548.6±10.98 a	96 145±1 399 a	15.20±0.48 a	32.77±1.27 a	34.42±0.61 a
2019	K0	15 892.7±32.27 b	95 040±754 b	17.07±0.36 a	31.67±0.75 ab	34.68±1.10 b
	K1	15 951.8±99.58 ab	95 785±737 ab	16.80±0.96 a	31.70±01.53 ab	35.57±1.39 ab
	K2	16 585.9±41.54 ab	95 880±853 ab	17.07±0.35 a	31.13±0.89 ab	36.24±1.00 ab
	K3	16 806.9±72.06 a	97 595±995 a	17.00±0.46 a	31.57±1.14 a	36.75±0.31 a
	K4	16 096.2±44.37 ab	96 550±1 400 ab	17.00±0.36 a	30.13±0.29 b	36.87±0.97 a
	K5	15 990.3±74.78 ab	96 080±355 ab	17.13±1.13 a	31.73±1.46 ab	34.37±1.48 b

指标Index	产量Yield	SPAD	F_o	F_m	F_v/F_m	F_v/F_o	PI	ABS/RC
产量Yield	1
SPAD	0.71	1
F_o	0.32	0.62	1
F_m	0.66	0.62	0.54	1
F_v/F_m	0.29	0.45	0.47	0.88^*	1
F_v/F_o	0.28	0.54	0.52	0.84^*	0.98^**	1
PI	0.29	0.52	0.21	0.71	0.88^*	0.92^*	1
ABS/RC	0.66	0.94^**	0.75	0.73	0.64	0.72	0.65	1

Effects of potassium application rate on chlorophyll fluorescence characteristics and yield of spring maize in Ningxia under integrated drip irrigation

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