Effects of Application Amount of Bio-organic Fertilizer on Agronomic Trait and Photosynthetic Characteristics of Polygonatum cyrtonema

doi:10.11924/j.issn.1000-6850.casb2024-0031

Abstract

Abstract:

This study was conducted to investigate the demand of biological organic fertilizer for Polygonatum cyrtonema during cultivation. Four treatments were set up, with 100, 125, 150, and 175 g/plant of bio-logical organic fertilizer being applied as base fertilizer, respectively. After the seedlings emerge in April and replanting in November each year, 75, 100, 125 and 150 g/plant of bio-organic fertilizer were applied respectively. Three years later, gas exchange parameters, chlorophyll fluorescence parameters, photosynthetic pigment content and morphological characteristics of P. cyrtonema in different treatment groups were measured. The results showed that the daily changes of net photosynthetic rate, transpiration rate and stomatal conductance of P. cyrtonema showed a “bimodal” curve, and photosynthesis was mainly limited by stomatal factors. The average daily net photosynthetic rate showed: 100 g group> 75 g group> 125 g group> 150 g group. The chlorophyll fluorescence parameter values ΦPSⅡ, ETR, Fv/Fm, Fv/Fo, qP and qN were all the highest in the 100 g group. The contents of chlorophyll a, chlorophyll b and carotenoids in the 100 g group were higher than those in the other three groups. Specific leaf weight and tuber dry weight were also highest in the 100 g group. P. cyrtonema do not tolerate high doses of fertilizers. It is recommended that planting P. cyrtonema can be applied with base fertilizer 125 g/plant, and follow-up fertilizer 100 g/plant.

Key words: Polygonatum cyrtonema, bio-organic fertilizer, gas exchange, chlorophyll fluorescence, photosynthetic pigment content, agronomic trait

QUAN Biyu, HE Anna, SU Lei, LI Shenghua, LI Changling. Effects of Application Amount of Bio-organic Fertilizer on Agronomic Trait and Photosynthetic Characteristics of Polygonatum cyrtonema[J]. Chinese Agricultural Science Bulletin, 2024, 40(34): 94-99.

Figures/Tables 5

References 29

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施肥量/g	净光合速率/[μmol/(m²·s)]	蒸腾速率/[mmol/(m²·s)]	气孔导度/[μmol/(m²·s)]	胞间二氧化碳浓度/(μmol/mol)	水分利用率/(g/kg)
75	3.66±0.289a	1.32±0.136b	0.045±0.003ab	272±29.7a	2.64±0.341a
100	3.84±0.335a	1.52±0.149a	0.048±0.005a	277±29.0a	2.29±0.353b
125	2.30±0.149b	1.39±0.144ab	0.041±0.004bc	300±33.1a	1.45±0.157c
150	2.11±0.123b	1.29±0.105b	0.037±0.003c	301±28.0a	1.33±0.128c

施肥量/g	净光合速率/[μmol/(m²·s)]	蒸腾速率/[mmol/(m²·s)]	气孔导度/[μmol/(m²·s)]	胞间二氧化碳浓度/(μmol/mol)	水分利用率/(g/kg)
75	3.66±0.289a	1.32±0.136b	0.045±0.003ab	272±29.7a	2.64±0.341a
100	3.84±0.335a	1.52±0.149a	0.048±0.005a	277±29.0a	2.29±0.353b
125	2.30±0.149b	1.39±0.144ab	0.041±0.004bc	300±33.1a	1.45±0.157c
150	2.11±0.123b	1.29±0.105b	0.037±0.003c	301±28.0a	1.33±0.128c

施肥量/g	Fv/Fm	Fv/Fo	qP	qN	ΦPSⅡ	ETR
75	0.799±0.011a	3.88±0.232ab	0.523±0.036a	0.874±0.023a	0.189±0.030a	55.4±8.71a
100	0.806±0.008a	4.17±0.036a	0.534±0.053a	0.891±0.021a	0.206±0.026a	60.4±7.60a
125	0.756±0.033b	3.41±0.140c	0.481±0.034a	0.889±0.016a	0.167±0.025b	49.2±7.49b
150	0.805±0.004a	3.54±0.473bc	0.340±0.112b	0.864±0.019a	0.134±0.040c	39.4±11.7c

施肥量/g	Fv/Fm	Fv/Fo	qP	qN	ΦPSⅡ	ETR
75	0.799±0.011a	3.88±0.232ab	0.523±0.036a	0.874±0.023a	0.189±0.030a	55.4±8.71a
100	0.806±0.008a	4.17±0.036a	0.534±0.053a	0.891±0.021a	0.206±0.026a	60.4±7.60a
125	0.756±0.033b	3.41±0.140c	0.481±0.034a	0.889±0.016a	0.167±0.025b	49.2±7.49b
150	0.805±0.004a	3.54±0.473bc	0.340±0.112b	0.864±0.019a	0.134±0.040c	39.4±11.7c

施肥量/g	叶绿素a/(mg/dm²)	叶绿素b/(mg/dm²)	类胡萝卜素/(mg/dm²)	总叶绿素/(mg/dm²)	叶绿素a/b
75	3.37±0.285a	1.29±0.159a	0.898±0.0525b	4.67±0.428a	2.62±0.158a
100	3.73±0.226a	1.40±0.087a	1.002±0.0562a	5.13±0.311a	2.67±0.050a
125	3.59±0.249a	1.40±0.078a	0.890±0.0883b	4.99±0.324a	2.57±0.072a
150	3.66±0.053a	1.37±0.105a	0.867±0.0231b	5.08±0.040a	2.58±0.081a