ACTA AGRICULTURAE BOREALI-SINICA ›› 2020, Vol. 35 ›› Issue (4): 137-144. doi: 10.7668/hbnxb.20190891

Special Issue: Oil crops

• Resource and Environment·Plant Protection • Previous Articles     Next Articles

Effects of Three Plant Growth Regulators on Relay Intercropped-soybean Nitrogen Accumulation,Distribution and Grain Quality

LUO Kai, DU Qing, CHEN Ping, XIE Chen, WANG Jin, WANG Tian, ZHANG Xiaona, YANG Wenyu, WU Yongcheng, YONG Taiwen   

  1. College of Agronomy, Sichuan Agricultural University, Key Laboratory of Crop Physiology, Ecology and Cultivation in Southwest China, Ministry of Agriculture, Sichuan Engineering Research Center for Crop Strip Intercropping System, Chengdu 611130, China
  • Received:2020-03-14 Published:2020-08-28

Abstract: In order to explore the effects of plant growth regulators on soybean grain quality in maize-soybean relay strip intercropping system. The experiment was used two-factor split plot design. The main factors were three soybean varieties:Gongqiu 8, Nandou 25 and Guixia 3, the side factors were three plant growth regulators:6-BA (6-Benzylaminopurine), DTA-6 (diethyl aminoethyl hexanoate), and S3307 (uniconazole), and sprayed with equal amount of clear water as control. The results showed that, compared with CK, the nitrogen content and accumulation in soybean grains were significantly increased after spraying DTA-6. At R6 stage, the leaf nitrogen accumulation of Gongqiu 8, Nandou 25 and Guixia 3 treat with DTA-6 was increased by 17.7%-63.1%, as compared with CK. At R6 stage, the stem nitrogen accumulation with DTA-6 was increased by 7.0%-60.9% compared to CK. At R8 stage, the grain nitrogen accumulation with DTA-6 was increased by 15.4%-24.9% compared to CK. Spraying regulators promoted the transfer of nitrogen to grains and protein synthesis. At R8 stage,the proportion of pods dry weight of Nandou 25 and Guixia 3 was significantly increased compared to CK after spraying DTA-6 and S3007. Compared with CK, DTA-6 increased the total protein content of Gongqiu 8, Nandou 25, and Guixia 3 by 45.8%, 47.1% and 29.0%; and the total protein and fat content increased by 42.2%, 45.2% and 24.0%. The application of plant growth regulators could improve nitrogen metabolism of soybean leaves, promote nitrogen accumulation and distribution to pods, increase protein content and total protein and fat content of soybean seeds, and improve the quality of soybean seeds. The most effective treatment was DTA-6.

Key words: Relay strip intercropping soybean, Plant growth regulators, Nitrogen accumulation, Nitrogen distribution, Quality

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Cite this article

LUO Kai, DU Qing, CHEN Ping, XIE Chen, WANG Jin, WANG Tian, ZHANG Xiaona, YANG Wenyu, WU Yongcheng, YONG Taiwen. Effects of Three Plant Growth Regulators on Relay Intercropped-soybean Nitrogen Accumulation,Distribution and Grain Quality[J]. ACTA AGRICULTURAE BOREALI-SINICA, 2020, 35(4): 137-144. doi: 10.7668/hbnxb.20190891.

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