行距和灌水量对番茄冠层光截获和光合能力、物质积累及果实品质的影响

doi:10.3864/j.issn.0578-1752.2023.11.009

Abstract

Abstract:

【Objective】Photosynthetically active radiation and photosynthetic physiological characteristics of leaves within the canopy were heterogeneous. The response to row spacing and irrigation amount of light interception and photosynthetic capacity of leaves in different parts of tomato canopy were explored in this study. The effects of row spacing and irrigation amount on photosynthetic productivity of tomato canopy were studied in detail, and the comprehensive quality of fruit was analyzed, which provided a theoretical basis for the setting of row spacing and irrigation amount in mechanized cultivation of tomato.【Method】Tomato, the test material, was cultivated in a wide and narrow row, with plant spacing of 35 cm. Small row spacing of 40 cm, and three large row spacing levels were set: 70 cm (P1), 120 cm (P2), and 170 cm (P3). Two irrigation levels were set: conventional irrigation (W1) and light deficit irrigation (W2). The experiment was a full factorial experiment with 6 treatments. The leaf area and light interception amount of each leaf position were measured. The canopy was divided into six parts, and the net photosynthetic rate (Pn), leaf mass per area (LMA), chlorophyll (Chl) and N, P, K content were measured. The canopy photosynthetic capacity under each treatment was comprehensively analyzed by taking the proportion of leaf area of each part to that of the whole plant or the proportion of leaf dry weight of each part to that of the whole plant as weights. The correlation of each index was analyzed by the Pearson correlation coefficient. The dry and fresh weight, yield per plant and fruit quality of the second ear were measured. The comprehensive quality of tomato was evaluated and ranked by PCA method and combined weighting-TOPSIS method based on game theory.【Result】The effects of increasing row spacing on canopy leaf area, light interception and photosynthetic capacity were mainly reflected in the middle and lower parts of the canopy. The leaf area in the mid canopy increased first and then decreased with the increase of the row spacing. The leaf area in the lower canopy and the light interception in the mid and lower canopy increased significantly from P1 to P2, but slightly increased from P2 to P3; the Pn in the mid and lower canopy showed that P2 increased by 8.06%-11.32% compared with P1, and P3 increased by 14.25%-24.40% compared with P2; the LMA showed that P2 increased by 1.31%-33.24% compared with P1, and P3 increased by 6.09%-17.86% compared with P2; the Chl content of P2 was 3.42%-6.81% higher than that of P1, and P3 was 3.19%-4.96% higher than that of P2; the N content of P2 was 13.89%-34.73% higher than that of P1, and P3 was 2.21%-19.74% higher than that of P2; the content of P and K had no obvious regularity. On the whole, the content of Pn, Chl and N increased with the increase of row spacing, and the LMA increased with the increase of row spacing under light deficit irrigation and showed P3>P1>P2 under conventional irrigation; under three row spacing levels, the LMA and N content under conventional irrigation were higher than those under light deficit irrigation, the Pn under conventional irrigation was higher than that under light deficit irrigation under P1 and P3, while the Pn under light deficiency irrigation was higher under P2; the Chl content under conventional irrigation was higher under P1, while the Chl content under light deficiency irrigation was higher under P2 and P3. With the increase of row spacing, the dry and fresh weight of the aboveground parts increased under conventional irrigation, and increased first and then decreased under light deficit irrigation; the aboveground dry and fresh weight of conventional irrigation was higher than that of light deficit irrigation. The yield per plant increased with the increase of row spacing under the two irrigation levels, and the increase from P1 to P2 was larger (compared with P1, P2 under conventional irrigation and light deficit irrigation increased by 33.75% and 24.32%, respectively.), while the yield per plant increased only slightly from P2 to P3 (compared with P2, P3 increased by 2.87% and 4.30% under conventional irrigation and light deficit irrigation, respectively.); the yield per plant under conventional irrigation was higher than that under light deficit irrigation. Increasing row spacing and reducing irrigation amount could optimize the comprehensive quality of fruit, and the top three comprehensive quality scores were P3W2, P2W2 and P3W1.【Conclusion】P3W1 was the highest in leaf Pn, LMA, N content, aboveground dry and fresh weight and yield per plant, and P3W2 was the highest in canopy light interception, Chl content and comprehensive quality score.

Key words: tomato, row spacing, irrigation amount, light interception, photosynthetic capacity, matter accumulation, comprehensive quality

CHANG JiaYue, MA XiaoLong, WU YanLi, LI JianMing. Effects of Row Spacing and Irrigation Amount on Canopy Light Interception and Photosynthetic Capacity, Matter Accumulation and Fruit Quality of Tomato[J].Scientia Agricultura Sinica, 2023, 56(11): 2141-2157.

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处理 Treatment	操作行行距 Ridge distance (cm)	灌溉水平 Irrigation level		灌水量 Irrigation amount (kg/plant)
处理 Treatment	操作行行距 Ridge distance (cm)	0—40 d	41 d—拉秧 41 d-Seedling pulling	灌水量 Irrigation amount (kg/plant)
P1W1	70	1.25 ET	1.50 ET	28.04
P1W2	70	1.00 ET	1.20 ET	22.44
P2W1	120	1.25 ET	1.50 ET	30.95
P2W2	120	1.00 ET	1.20 ET	24.76
P3W1	170	1.25 ET	1.50 ET	36.3
P3W2	170	1.00 ET	1.20 ET	29.04

		07：00	08：00	09：00	10：00	11：00	12：00	13：00	14：00	15：00	16：00	17：00
棚外PAR PAR outside the shed (μmol·m^-2·s^-1)	晴天 Sunny day	35.78	244.53	583.28	883.28	1085.37	1149.53	1032.03	802.87	516.62	210.37	57.03
棚外PAR PAR outside the shed (μmol·m^-2·s^-1)	多云天 Cloudy day	13.7	163.7	369.95	539.12	571.2	506.62	469.12	389.53	329.53	122.87	13.7
棚内PAR PAR inside the shed (μmol·m^-2·s^-1)	晴天 Sunny day	30.41	207.85	495.79	750.79	922.56	977.1	877.23	682.44	439.13	178.81	48.48
棚内PAR PAR inside the shed (μmol·m^-2·s^-1)	多云天 Cloudy day	11.64	139.14	314.46	458.25	485.52	430.63	398.75	331.1	280.1	104.44	11.64
散射光比例 The proportion of scattered light	晴天 Sunny day	1	0.69	0.47	0.42	0.36	0.42	0.55	0.71	0.89	1	1
散射光比例 The proportion of scattered light	多云天 Cloudy day	1	0.75	0.64	0.69	0.81	0.94	0.97	0.99	0.99	1	1

	Pn (µmol·m^-2·s^-1)	LMA (mg·cm^-2)	Chl含量 Chl content (mg·g^-1)	N含量 N content (mg·g^-1)	P含量 P content (mg·g^-1)	K含量 K content (mg·g^-1)
P1W1	13.26±0.15c	4.49±0.05b	1.52±0.01d	37.94±0.74c	7.56±0.10b	99.27±1.27b
P1W2	12.06±0.05d	3.59±0.13d	1.51±0.01d	35.86±0.51c	8.27±0.15a	114.74±1.46a
P2W1	13.95±0.10b	4.39±0.13bc	1.56±0.01c	45.16±0.30ab	6.87±0.19c	101.64±3.07b
P2W2	14.05±0.05b	3.81±0.04d	1.62±0.01b	44.16±1.05b	7.52±0.19b	104.23±1.55b
P3W1	15.56±0.09a	4.91±0.18a	1.60±0.01b	46.84±0.57a	8.42±0.17a	117.29±3.82a
P3W2	14.21±0.29b	4.23±0.05c	1.65±0.03a	45.25±1.14ab	7.12±0.14c	105.76±4.64b

	果形指数 Fruit shape index	果实硬度 Fruit firmness (N)	单果重 Single fruit weight (g)	果实含水量 Fruit moisture content (%)	可溶性固形物 Soluble solids (%)	有机酸 Organic acid (%)	固酸比 Solid acid ratio	可溶性蛋白 Soluble protein (mg∙g^-1)	维生素C Vitamin C (mg∙g^-1)	番茄红素 Lycopene (mg/100 g)
P1W1	0.93±0.04ab	20.55±1.15b	81.21±1.75c	89.08±0.16a	4.63±0.04e	0.75±0.03c	6.22±0.21a	7.43±0.48c	6.93±0.68e	11.61±1.86c
P1W2	0.90±0.02bc	23.35±0.75ab	76.71±0.71d	88.01±0.45ab	6.43±0.13c	1.60±0.11a	4.03±0.22d	8.65±0.47bc	12.28±1.47c	15.52±1.00b
P2W1	0.86±0.01c	17.83±1.49c	109.77±2.41a	88.50±0.10a	4.98±0.04d	0.86±0.11c	5.91±0.78ab	8.78±0.39bc	10.15±1.23d	15.56±1.27b
P2W2	0.89±0.04bc	22.95±1.72b	96.09±1.72b	86.26±2.15b	6.60±0.00c	1.26±0.11b	5.28±0.46bc	9.89±0.84b	13.99±0.51c	20.30±2.39a
P3W1	0.90±0.02bc	21.78±2.25b	113.21±2.34a	89.22±0.01a	6.80±0.14b	1.33±0.09b	5.14±0.42bc	9.58±2.06bc	17.20±0.64b	15.77±0.55b
P3W2	0.96±0.02a	25.73±1.37a	99.78±0.94b	88.64±0.21a	7.95±0.15a	1.73±0.16a	4.64±0.51cd	17.54±0.44a	21.80±0.91a	17.29±0.61ab
P	**	**	***	NS	***	***	NS	***	***	**
W	NS	***	***	*	***	***	***	***	***	**
P*W	*	NS	**	NS	***	**	*	***	NS	NS

	X1	X2	X3	X4	X5	X6	X7	X8	X9
PCA	-0.0247	0.2008	0.1215	0.2765	0.2241	-0.1686	0.2063	0.2813	0.3167
AHP	0.0168	0.0371	0.0259	0.1522	0.0418	0.2970	0.0961	0.1038	0.2294
熵权法 Entropy method	0.1025	0.111	0.1427	0.1066	0.1069	0.1011	0.1259	0.1046	0.0987
基于博弈论的组合赋权法 Combination weighting method based on game theory	0.0273	0.0462	0.0402	0.1466	0.0498	0.273	0.0998	0.1039	0.2134

Effects of Row Spacing and Irrigation Amount on Canopy Light Interception and Photosynthetic Capacity, Matter Accumulation and Fruit Quality of Tomato

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处理 Treatment	PCA法 PCA method		基于博弈论的组合赋权-TOPSIS法 Combination weighting based on game theory-TOPSIS method
处理 Treatment	综合得分 Overall ratings	排序 Rank	综合得分 Overall ratings	排序 Rank
P1W1	-15.54	6	0.3925	5
P1W2	65.27	4	0.3411	6
P2W1	35.34	5	0.4572	4
P2W2	90.56	2	0.6035	2
P3W1	80.86	3	0.5137	3
P3W2	125.07	1	0.6176	1

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