Mixed Application of Superphosphate and Organic Fertilizer: Effects on Photosynthetic Characteristics and Yield of Wheat in Saline Alkali Soil

doi:10.11924/j.issn.1000-6850.casb2020-0508

Abstract

Abstract:

Different fertilization measures were studied in order to provide a theoretical basis for wheat production in saline alkali soil. ‘Qingmai 6’ was used as experimental material, and four processing methods were set up: compound fertilizer (CK), organic fertilizer (T1), superphosphate (T2), organic fertilizer and superphosphate (T3). The effects of different measures on the photosynthetic characteristics of wheat flag leaves and yield of wheat were studied. The results showed that, compared with other treatments, T3 treatment increased chlorophyll content (SPAD), leaf area index (LAI), photosynthetic rate (Pn), stomatal conductance (Gs) and transpiration rate (Tr) of wheat in saline alkali soil, while it reduced the intercellular carbon dioxide concentration (Ci) of flag leaves. At the late flowering stage, the increase range of T3 was more obvious, which effectively guarantee the photosynthesis at the late flowering stage. Compared with other treatments, T3 could significantly increase the ear number, kernel number per spike, and 1000-grain weight, and promote the increase of yield. The yield of T3 reached 8523.32 kg/hm². Therefore, the results indicate that the mixed application of organic fertilizer and superphosphate fertilizers (T3) can be used as proper fertilization practice of wheat in saline alkali soil.

Key words: fertilizer, organic fertilizer, superphosphate, wheat in saline alkali soil, photosynthetic characteristics, yield

CLC Number:

S512.1+1

Xue Yuansai, Shi Changhai, Wang Yuanxi, Wu Zhen, Zhang Shoufu, Liu Yiguo. Mixed Application of Superphosphate and Organic Fertilizer: Effects on Photosynthetic Characteristics and Yield of Wheat in Saline Alkali Soil[J]. Chinese Agricultural Science Bulletin, 2021, 37(20): 1-6.

Figures/Tables 8

References 29

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处理	开花后天数
处理	0 d	7 d	14 d	21 d	28 d
CK	50.87ab	45.97ab	35.57b	31.60ab	22.80bc
T1	45.33c	43.43bc	32.87bc	30.83b	25.87b
T2	48.10b	44.83b	31.30c	29.77bc	25.73b
T3	53.80a	49.53a	44.73a	35.73a	29.33a

处理	开花后天数
处理	0 d	7 d	14 d	21 d	28 d
CK	50.87ab	45.97ab	35.57b	31.60ab	22.80bc
T1	45.33c	43.43bc	32.87bc	30.83b	25.87b
T2	48.10b	44.83b	31.30c	29.77bc	25.73b
T3	53.80a	49.53a	44.73a	35.73a	29.33a

处理	开花后天数
处理	0 d	7 d	14 d	21 d	28 d
CK	4.87b	4.17b	3.57b	3.01bc	2.80bc
T1	4.33bc	4.13b	3.67b	3.13b	2.87b
T2	4.10c	4.08b	3.50bc	2.77d	2.73c
T3	5.30a	4.95a	4.53a	3.73a	3.23a

处理	开花后天数
处理	0 d	7 d	14 d	21 d	28 d
CK	4.87b	4.17b	3.57b	3.01bc	2.80bc
T1	4.33bc	4.13b	3.67b	3.13b	2.87b
T2	4.10c	4.08b	3.50bc	2.77d	2.73c
T3	5.30a	4.95a	4.53a	3.73a	3.23a

处理	开花后天数
处理	0 d	7 d	14 d	21 d	28 d
CK	14.87bc	16.17bc	14.57b	13.01bc	9.80b
T1	15.33b	14.13b	13.67bc	13.13b	10.87ab
T2	14.10c	16.08bc	13.50bc	12.77c	9.73b
T3	17.30a	20.95a	17.53a	15.73a	11.23a