Multi-factor Irrigation Scheme of Cherry Tomato Based on Substrate Moisture

doi:10.11923/j.issn.2095-4050.cjas2021-0185

Abstract

Abstract:

The paper aims to achieve accurate and intelligent water and fertilizer management, reduce the amount of irrigation and fertilizer, and improve the quality of fruit. The irrigation decision-making and control system was constructed, and the irrigation scheme was based on light radiation, moisture and return solution conductivity. Cherry tomato was taken as the experimental object, three field application parameters were set to verify the application effect of the decision-making system. The fruit biomass, yield and quality of cherry tomato were determined. The results showed that the irrigation decision-making and control system worked normally during the growth period of cherry tomato. It could replace the manual management effectively. When the threshold of light radiation activation reached 200, 400 and 100 J/cm² at seedling stage, flowering stage and fruiting stage respectively, irrigation was activated. The single irrigation amount was calculated from the difference between 80% of the upper limit of substrate relative water content and the real-time relative water content. When the EC difference between irrigation solution and return solution was greater than 1.0 mS/cm, the irrigation volume was increased by 1.3 times. The tomato plants in this treatment were stronger, the amount of irrigation and fertilizer was the least, the production efficiency of water and fertilizer was enhanced, and the fruit quality was improved. It is suitable for field application in cherry tomato cultivation with coconut bran.

Key words: light radiation, moisture, return solution, irrigation scheme, cherry tomato, quality

YUE Huanfang, LI Chao, AN Shunwei, MENG Fanyu, HU Xiaoyi, ZHANG Haifang, ZHANG Ningning, WANG Meng. Multi-factor Irrigation Scheme of Cherry Tomato Based on Substrate Moisture[J]. Journal of Agriculture, 2023, 13(2): 43-49.

Figures/Tables 8

References 32

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处理	鲜重/g		干重/g		含水率/%
处理	地下部	地上部	地下部	地上部	地下部	地上部
T1	23.62±1.24b	1108.09±17.30b	9.16±0.66b	221.56±3.28a	58.62±0.95b	79.92±1.42b
T2	29.66±1.59ab	1210.36±12.30a	9.82±0.13b	221.26±2.13a	65.94±0.88ab	81.72±0.82a
T3	41.96±1.28a	1297.66±18.22a	11.56±0.85a	236.32±3.01a	72.03±0.09a	81.72±1.45a

处理	鲜重/g		干重/g		含水率/%
处理	地下部	地上部	地下部	地上部	地下部	地上部
T1	23.62±1.24b	1108.09±17.30b	9.16±0.66b	221.56±3.28a	58.62±0.95b	79.92±1.42b
T2	29.66±1.59ab	1210.36±12.30a	9.82±0.13b	221.26±2.13a	65.94±0.88ab	81.72±0.82a
T3	41.96±1.28a	1297.66±18.22a	11.56±0.85a	236.32±3.01a	72.03±0.09a	81.72±1.45a

处理	全氮/(g/kg)	有效磷/(mg/kg)	速效钾/(mg/kg)	EC/(mS/cm)	pH
种植前	4.26	70.7	165	1.30	7.4
T1	11.1	1292	5.35×10³	3.49	7.72
T2	11.2	864	7.25×10³	3.61	7.62
T3	12.1	902	5.90×10³	2.88	7.74

处理	全氮/(g/kg)	有效磷/(mg/kg)	速效钾/(mg/kg)	EC/(mS/cm)	pH
种植前	4.26	70.7	165	1.30	7.4
T1	11.1	1292	5.35×10³	3.49	7.72
T2	11.2	864	7.25×10³	3.61	7.62
T3	12.1	902	5.90×10³	2.88	7.74

处理	可溶性总糖/%	可滴定酸度/%	糖酸比	可溶性蛋白/%	维生素C/(mg/kg)	NO₃^--N/(mg/kg)
T1	7.76±0.44a	0.799±0.024a	9.71±0.47a	0.207±0.015a	494.33±57.14a	51.53±2.00b
T2	6.87±0.61b	0.805±0.058a	8.53±1.75b	0.210±0.030a	493.67±109.93a	57.60±0.50a
T3	6.77±1.10b	0.787±0.061a	8.60±1.03b	0.213±0.012a	365.13±266.28b	58.47±6.12a