Acta Agriculturae Boreali-Sinica ›› 2024, Vol. 39 ›› Issue (S1): 117-124. doi: 10.7668/hbnxb.20194391

Special Issue: Saline-alkali stress Cultivation & Physiology

• Tillage & Cultivation·Physiology & Biochemistry • Previous Articles     Next Articles

Effects of Allantoin Spraying at Different Periods on Photosynthetic Characteristics and Yield of Sugar Beet Planted in Saline-alkali Soil

YU Xinrui1, ZHAO Jianan2, ZHUANG Yanlong1, WANG Chao1, ZHAO Linghua1, YANG Xiaofei1, WANG Yubo1, LI Caifeng1   

  1. 1 College of Agriculture,Northeast Agricultural University,Harbin 150030,China
    2 Sanhe Vocational and Technical Education Center,Sanhe 065200,China
  • Received:2023-07-10 Published:2025-01-24

Abstract:

In order to investigate the optimal application period of allantoin,Sweet Research No.8 was used as the experimental material in saline soil located in Wuma Village,Shangjia Town,Zhaodong City,Heilongjiang Province.Six treatments were established:spraying with a mass concentration of 0.1 mmol/L allantoin at the seedling stage(M),leaf tufts rapid growth stage(Y),tuber expansion stage(K),seedling stage + leaf tufts rapid growth stage(MY),and seedling stage + leaf tufts rapid growth stage + tuber expansion stage(MYK),and a control group was sprayed with water(CK).The effects of allantoin spraying on the photosynthetic characteristics,antioxidant enzyme activities and tuber yield indexes of sugar beet were determined at different periods.The results showed that the chlorophyll content of allantoin treatment increased compared with that of CK,and with the MY treatment being 27.8%,12.4%,21.8%,and 32.2% higher than the MY treatment in all periods;the stomatal conductance of allantoin sprayed treatments,RuBP enzyme activity,transpiration rate,photochemical quenching capacity,actual photosynthetic efficiency,and antioxidant enzyme activity were all differently enhanced compared with that of CK;the nonoptical quenching capacity,malondialdehyde content,and intercellular CO2 concentration were lower than CK,with the MY treatment having the best effect,and there was no significant difference between the MYK and MY treatments.Compared with the CK treatment,the yield of MY-treated tubers increased by 26.6%,and the sugar yield increased by 21.3% percentage points.In summary,spraying allantoin in the seedling + leaf cluster growth period can effectively alleviate the harm caused by saline stress to sugar beet,thus improving sugar beet yield,and providing a theoretical basis for exogenous allantoin to improve saline-alkali tolerance of sugar beet.

Key words: Beet salt, Saline-alkali stress, Allantoin, Antioxidant enzyme, Photosynthetic characteristic, Yield

Cite this article

YU Xinrui, ZHAO Jianan, ZHUANG Yanlong, WANG Chao, ZHAO Linghua, YANG Xiaofei, WANG Yubo, LI Caifeng. Effects of Allantoin Spraying at Different Periods on Photosynthetic Characteristics and Yield of Sugar Beet Planted in Saline-alkali Soil[J]. Acta Agriculturae Boreali-Sinica, 2024, 39(S1): 117-124. doi: 10.7668/hbnxb.20194391.

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