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Agronomy 2018, 8(9), 168;

Imbalance Water Deficit Improves the Seed Yield and Quality of Soybean

Key Laboratory of Crop Ecophysiology and Farming System in Southwest, Ministry of Agriculture, Chengdu 611130, China
Institute of Ecological Agriculture, Sichuan Agricultural University, Chengdu 611130, China
These authors contributed equally to this work.
Authors to whom correspondence should be addressed.
Received: 24 July 2018 / Revised: 24 August 2018 / Accepted: 27 August 2018 / Published: 30 August 2018
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Water imbalance condition (WIC) in a maize-soybean relay intercropping system is the main abiotic stress limiting biomass production and seed yield and, consequently, seed-quality. This experiment was started to study the effects of WIC on soybean, in which two soybean genotypes ND12 and C103 were grown in pots with roots split equally between two soil column and six WIC treatments (%) T1 (100), T2, (100:50), T3 (100:20), T4 (50:50), T5 (50:20), and T6 (20:20) field capacity on both sides of soybean roots were used. Results showed that both genotypes responded significantly to WIC treatments for all the parameters; however, the level of response differed between genotypes. Maximum osmoprotectants (except proline), biomass, yield and yield-related traits and superior seed quality were observed with ND12. Among WIC treatments, T2 and T3 produced 94% and 85%, and 93% and 81% of T1 biomass and yield, respectively. Similarly, treatments T2 and T3 also improved the oil quality by maintaining the content of unsaturated fatty acids and isoflavone content, while opposite trends were observed for protein content. Overall, moderate water reduction (T2 and T3) can improve soybean seed-quality and by selecting drought-resistant genotypes we can increase the soybean yield under intercropping systems. View Full-Text
Keywords: drought; fatty acids; isoflavone; intercropping; protein; starch drought; fatty acids; isoflavone; intercropping; protein; starch

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Iqbal, N.; Hussain, S.; Zhang, X.-W.; Yang, C.-Q.; Raza, M.A.; Deng, J.-C.; Ahmad, S.; Ashgar, M.A.; Zhang, J.; Yang, W.; Liu, J. Imbalance Water Deficit Improves the Seed Yield and Quality of Soybean. Agronomy 2018, 8, 168.

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