Effects of Humic Acid on the Growth, Physiology and Water Use Efficiency of Zucchini Seedlings

doi:10.11924/j.issn.1000-6850.casb2021-0866

Abstract

Abstract:

To study the influence of potassium fulvic acid (FA), potassium humate (HA) and biochemical potassium humate (BFA) on the growth of zucchini seedlings under different water conditions, with zucchini as the test material, three kinds of potassium humate and three water treatments were combined to study the response characteristics of zucchini seedling growth, physiology and water use efficiency. The results showed that under the same water condition and compared with seedlings without potassium humate treatment, the plant height, stem diameter and leaf area of zucchini seedlings increased significantly under potassium humate treatment, and the effect of biochemical potassium humate was the most significant. Under the action of the same potassium humate, the activity of antioxidant enzymes CAT and SOD in zucchini seedlings increased with the increase of water stress, so did the water use efficiency, and the seedlings treated with biochemical potassium humate had the best water use efficiency. Comprehensive analysis showed that adding potassium humate could mitigate water stress on zucchini seedlings.

Key words: zucchini, humic acid, growth index, physiological property, antioxidant enzyme, water use efficiency

CLC Number:

S642.6

WANG Yan, LI Lingzhi, GUO Wenzhong, WEN Jiangli, LI Yinkun, FAN Fengcui, WU Yuesheng, LI Haiping. Effects of Humic Acid on the Growth, Physiology and Water Use Efficiency of Zucchini Seedlings[J]. Chinese Agricultural Science Bulletin, 2022, 38(13): 47-53.

Figures/Tables 7

References 27

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处理编号	腐植酸浓度/(mg/L)	腐植酸种类	补充灌溉蒸腾蒸发量的百分比/%
CK100%	0	—	100
CK75%	0		75
CK50%	0		50
F100%	300	黄腐酸钾	100
F75%	300		75
F50%	300		50
H100%	300	腐植酸钾	100
H75%	300		75
H50%	300		50
B100%	300	生化腐植酸钾	100
B75%	300		75
B50%	300		50

处理编号	腐植酸浓度/(mg/L)	腐植酸种类	补充灌溉蒸腾蒸发量的百分比/%
CK100%	0	—	100
CK75%	0		75
CK50%	0		50
F100%	300	黄腐酸钾	100
F75%	300		75
F50%	300		50
H100%	300	腐植酸钾	100
H75%	300		75
H50%	300		50
B100%	300	生化腐植酸钾	100
B75%	300		75
B50%	300		50

处理编号	株高/cm	茎粗/mm	叶面积/cm²	壮苗指数	单株鲜重/g	单株干重/g
CK100%	8.10b	4.17bc	122.74c	0.2628bc	12.51b	1.45cd
CK75%	7.20cd	4.05cd	114.92e	0.2502de	10.45d	1.32e
CK50%	6.90d	3.80f	103.23g	0.2247f	8.96f	1.18f
F100%	9.17a	4.39a	127.46b	0.2771a	12.83ab	1.54b
F75%	8.13b	4.21b	118.21de	0.2583bc	11.75c	1.42d
F50%	7.00d	3.92def	110.08f	0.2391e	9.51e	1.23f
H100%	9.03a	4.37a	126.82b	0.2707ab	12.77ab	1.50bc
H75%	7.60bc	4.15bc	120.32cd	0.2536cd	10.80d	1.42d
H50%	6.97d	3.90ef	109.26f	0.2365ef	9.08f	1.19f
B100%	9.37a	4.42a	132.58a	0.2791a	13.10a	1.63a
B75%	7.93b	4.23b	129.95ab	0.2702ab	11.91c	1.43d
B50%	7.17cd	3.99de	122.56c	0.2479de	9.86e	1.29e

处理编号	株高/cm	茎粗/mm	叶面积/cm²	壮苗指数	单株鲜重/g	单株干重/g
CK100%	8.10b	4.17bc	122.74c	0.2628bc	12.51b	1.45cd
CK75%	7.20cd	4.05cd	114.92e	0.2502de	10.45d	1.32e
CK50%	6.90d	3.80f	103.23g	0.2247f	8.96f	1.18f
F100%	9.17a	4.39a	127.46b	0.2771a	12.83ab	1.54b
F75%	8.13b	4.21b	118.21de	0.2583bc	11.75c	1.42d
F50%	7.00d	3.92def	110.08f	0.2391e	9.51e	1.23f
H100%	9.03a	4.37a	126.82b	0.2707ab	12.77ab	1.50bc
H75%	7.60bc	4.15bc	120.32cd	0.2536cd	10.80d	1.42d
H50%	6.97d	3.90ef	109.26f	0.2365ef	9.08f	1.19f
B100%	9.37a	4.42a	132.58a	0.2791a	13.10a	1.63a
B75%	7.93b	4.23b	129.95ab	0.2702ab	11.91c	1.43d
B50%	7.17cd	3.99de	122.56c	0.2479de	9.86e	1.29e

处理编号	过氧化氢酶活性/ [U/(g·min)]	过氧化物酶活性/ [U/(g·h)]	超氧化物歧化酶活性/ [U/(g·h)]
CK100%	136.45d	79.06cd	156.45d
CK75%	170.16c	75.15cd	166.08cd
CK50%	187.47bc	68.71d	158.10d
F100%	162.76cd	81.10cd	168.01bcd
F75%	198.08b	102.37bc	187.00abcd
F50%	203.88b	92.01cd	209.84abc
H100%	168.85c	80.21cd	168.28bcd
H75%	169.25c	72.79d	204.06abcd
H50%	172.42c	124.59ab	230.20a
B100%	168.59c	84.80cd	173.24bcd
B75%	180.77bc	102.82bc	216.72ab
B50%	218.87a	132.75a	232.13a