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Chinese Agricultural Science Bulletin ›› 2025, Vol. 41 ›› Issue (7): 15-21.doi: 10.11924/j.issn.1000-6850.casb2024-0516

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Effects of Green Fertilizer Rotation on Agronomic Traits, Yield and Soil Nutrients of Millet

ZHAO Na1(), LI Guoqing1, LI Guoyu1, CONG Xinjun1(), ZHANG Jibo2, XU Huiyuan1   

  1. 1 Taian Academy of Agricultural Sciences, Tai’an, Shandong 271000
    2 Shandong Climate Center, Jinan 250031
  • Received:2024-08-13 Revised:2024-12-17 Online:2025-03-05 Published:2025-03-03

Abstract:

To explore the effects of different green manure/millet rotations on millet yield and soil fertility, three kinds of green manure commonly used in the north were selected to rotate with millet, such as Vicia villosa(CV), Brassica napus (CB) and Orychophragmus violaceus(CO), and the winter fallow field was used as the control (CK). The effects of total nitrogen, phosphorus, potassium, available phosphorus, available potassium, organic matter and pH of topsoil in three different periods of before turning green manure (T1), 30 days after turning green manure (T2) and 60 days after turning green manure (T3) were studied, and the effects of different treatment on agronomic traits and yield of millet were determined. The results showed that the soil total nitrogen, phosphorus, potassium, available phosphorus, available potassium and organic matter in the three periods increased first and then decreased, which reached the lowest value in the T3 period, then the pH of each treatment reached the lowest in the T2 period, indicating that the three green manures can fertilize the soil. Compared with CK, the three green manure treatments could increase the plant height, ear length, ear diameter and milling ratio, the effects of different green manures were not the same. In terms of the yield, the three green manure treatments could increase the yield of millet, with an increase range of 22.56% to 65.34%. The comprehensive performance of the three green manures on soil nutrients and the yield of subsequent millet was CB>CV>CO. Therefore, under the experimental conditions, the Brassica napus was more suitable for rotation with millet.

Key words: green manure, millet, agronomic traits, yield, soil fertility, crop rotation