Effect of Spraying Alginate Enhancing Solution at Different Growth Stages on Photosynthetic Characteristics and Yield of Winter Wheat

doi:10.11924/j.issn.1000-6850.casb2024-0778

Abstract

Abstract:

To explore the effect of alginate enhancing solution on the photosynthetic characteristics and yield of winter wheat, four different concentration treatments were set during the regreening stage, jointing stage and booting stage of winter wheat, which were 0 mg/kg (CK), 30 mg/kg (N30), 60 mg/kg (N60) and 90 mg/kg (N90). The indexes such as chlorophyll content, grain filling rate, dry matter accumulation and distribution, photosynthetic characteristics and yield among different treatments were studied. The results showed that spraying alginate enhancing solution could significantly increase the chlorophyll content of wheat flag leaves and the grain filling rate, especially in the late stage of flowering, it still maintained a significant advantage compared with CK. The dry matter accumulation of stem sheath + leaves, ear shaft + glume, grain and distribution ratio were significantly higher than those of CK, among which the advantage of N30 treatment at the jointing stage was the most obvious. In photosynthesis, spraying alginate enhancing solution significantly increased the net photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr) of flag leaves, reduced the intercellular carbon dioxide concentration (Ci) of flag leaves, keeping the crops at a high photosynthetic rate all the time. In terms of yield and composition factors, there were no significant differences in the number of spikes and grains per spike among different concentration treatments compared with CK, but the thousand grain weight and yield were significantly higher than CK. Among them, spraying alginate enhancing solution at 30 mg/kg at the jointing stage had the best yield-increasing effect, with a yield of 8811.96 kg/hm², which was 12.01% higher than that of the CK treatment in the same growth period. In summary, spraying alginate enhancing solution at 30 mg/kg at the jointing stage is a more reasonable fertilization scheme.

Key words: growth period, alginate enhancing solution, winter wheat, photosynthetic characteristics, yield

TIAN Cuiling, TIAN Jialiang. Effect of Spraying Alginate Enhancing Solution at Different Growth Stages on Photosynthetic Characteristics and Yield of Winter Wheat[J]. Chinese Agricultural Science Bulletin, 2025, 41(9): 25-31.

Figures/Tables 5

References 28

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生育期	处理	花后天数/d
生育期	处理	0	7	14	21	28
返青期	CK	43.63d	38.65d	32.16c	28.97e	25.67d
	N30	46.95ab	42.36b	38.97ab	32.49c	29.76ab
	N60	46.89b	42.28b	37.95b	31.12cd	28.65bc
	N90	45.89bc	40.56c	37.89b	30.98d	28.95bc
拔节期	CK	42.98d	38.74d	31.98c	28.76e	24.86d
	N30	47.62a	43.65a	40.53a	35.47a	31.46a
	N60	46.99ab	42.98ab	39.87a	34.88a	29.89ab
	N90	47.01ab	42.05b	38.09b	34.42ab	30.03a
孕穗期	CK	43.52d	38.34d	31.85c	28.68e	24.79de
	N30	47.49a	42.56ab	39.06ab	33.34bc	30.12a
	N60	46.89b	42.74ab	38.06b	32.69c	28.70bc
	N90	46.01bc	40.90c	37.65b	32.85c	29.07b

生育期	处理	花后天数/d
生育期	处理	0	7	14	21	28
返青期	CK	43.63d	38.65d	32.16c	28.97e	25.67d
	N30	46.95ab	42.36b	38.97ab	32.49c	29.76ab
	N60	46.89b	42.28b	37.95b	31.12cd	28.65bc
	N90	45.89bc	40.56c	37.89b	30.98d	28.95bc
拔节期	CK	42.98d	38.74d	31.98c	28.76e	24.86d
	N30	47.62a	43.65a	40.53a	35.47a	31.46a
	N60	46.99ab	42.98ab	39.87a	34.88a	29.89ab
	N90	47.01ab	42.05b	38.09b	34.42ab	30.03a
孕穗期	CK	43.52d	38.34d	31.85c	28.68e	24.79de
	N30	47.49a	42.56ab	39.06ab	33.34bc	30.12a
	N60	46.89b	42.74ab	38.06b	32.69c	28.70bc
	N90	46.01bc	40.90c	37.65b	32.85c	29.07b

生育期	处理	花后天数/d
生育期	处理	7	14	21	28	35
返青期	CK	0.81bc	0.96ab	1.18c	0.91c	0.74bc
	N30	0.89ab	0.96ab	1.25b	0.99b	0.83b
	N60	0.90ab	0.94b	1.22bc	0.98bc	0.80b
	N90	0.84b	0.86bc	1.09cd	0.96bc	0.79bc
拔节期	CK	0.83bc	0.92bc	1.19c	0.92c	0.76bc
	N30	0.95a	1.12a	1.35a	1.20a	0.96a
	N60	0.92a	1.11a	1.30a	1.16a	0.92ab
	N90	0.87ab	1.05a	1.28ab	1.09ab	0.87ab
孕穗期	CK	0.79c	0.94b	1.20bc	0.92c	0.76bc
	N30	0.91ab	1.01ab	1.29ab	1.06ab	0.86ab
	N60	0.90ab	0.98ab	1.25b	0.98bc	0.86ab
	N90	0.85b	0.98ab	1.18c	1.01b	0.82b

生育期	处理	花后天数/d
生育期	处理	7	14	21	28	35
返青期	CK	0.81bc	0.96ab	1.18c	0.91c	0.74bc
	N30	0.89ab	0.96ab	1.25b	0.99b	0.83b
	N60	0.90ab	0.94b	1.22bc	0.98bc	0.80b
	N90	0.84b	0.86bc	1.09cd	0.96bc	0.79bc
拔节期	CK	0.83bc	0.92bc	1.19c	0.92c	0.76bc
	N30	0.95a	1.12a	1.35a	1.20a	0.96a
	N60	0.92a	1.11a	1.30a	1.16a	0.92ab
	N90	0.87ab	1.05a	1.28ab	1.09ab	0.87ab
孕穗期	CK	0.79c	0.94b	1.20bc	0.92c	0.76bc
	N30	0.91ab	1.01ab	1.29ab	1.06ab	0.86ab
	N60	0.90ab	0.98ab	1.25b	0.98bc	0.86ab
	N90	0.85b	0.98ab	1.18c	1.01b	0.82b

生育期	处理	茎鞘+叶片		穗轴+颖壳		籽粒
生育期	处理	数量/(kg/hm²)	比例/%	数量/(kg/hm²)	比例/%	数量/(kg/hm²)	比例/%
返青期	CK	7052.31e	40.18ab	3596.52d	20.49 ab	6903.42e	39.33d
	N30	8065.32b	40.12bc	3907.13ab	19.43 bc	8132.46bc	40.45ab
	N60	7896.54c	39.96d	3899.64ab	19.73 b	7965.78c	40.31bc
	N90	7754.62cd	40.01cd	3786.31bc	19.53 bc	7842.31d	40.46ab
拔节期	CK	6963.25e	40.01 cd	3605.63d	20.72 a	6834.15e	39.27d
	N30	8232.21a	40.05 c	3969.85a	19.31 cd	8354.63a	40.64a
	N60	8158.64ab	40.18ab	3935.61a	19.38 c	8211.23ab	40.44ab
	N90	8146.52ab	40.22ab	3954.19a	19.52 bc	8154.36b	40.26bc
孕穗期	CK	6986.52e	40.02cd	3576.52d	20.49 ab	6895.62e	39.49d
	N30	8145.68ab	40.16b	3946.53a	19.46 bc	8189.65b	40.38b
	N60	8034.59b	40.35a	3876.52ab	19.47bc	7998.69c	40.18c
	N90	7936.74bc	40.28 a	3814.52b	19.36 c	7952.32cd	40.36b