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Effects of Deep Vertical Rotary Tillage on Soil Water Use and Yield Formation of Forage Maize on Semiarid Land

文献类型： 外文期刊

作者： Fang, Yanjie 1 ; Tan, Weijun 3 ; Hou, Huizhi 1 ; Wang, Hongli 1 ; Yin, Jiade 1 ; Zhang, Guoping 1 ; Lei, Kangning 1 ; Dong, Bo 1 ; Qin, Anzhen 4 ;

作者机构： 1.Gansu Acad Agr Sci, Inst Dry Land Agr, Lanzhou 730070, Peoples R China

2.Key Lab High Water Utilizat Dryland Gansu Prov, Lanzhou 730070, Peoples R China

3.Dingxi Acad Agr Sci, Dingxi 730050, Peoples R China

4.Chinese Acad Agr Sci, Inst Farmland Irrigat, Xinxiang 453002, Peoples R China

关键词： vertical rotary sub-soiling; plastic-film mulching; yield components; precipitation years; Zea mays L.

期刊名称：AGRICULTURE-BASEL （ 影响因子：3.3； 五年影响因子：3.5 ）

ISSN：

年卷期： 2024 年 14 卷 6 期

页码：

收录情况： SCI

摘要： Forage maize is one of the most important feed crops for livestock production, and is mainly grown in northwest China. However, their growth is often stressed by limited soil water availability due to the arid climate. To provide more soil moisture, a high-efficiency tillage technique was required to make crops effectively use soil moisture in deep soil layers. Deep vertical rotary tillage is a promising choice for this purpose. In this study, a long-term (2020-2022) field experiment consisting of three treatments, i.e., traditional tillage (TT), deep rotary tillage (DT), and deep vertical rotary tillage (VRT), was carried out in semiarid areas of Loess Plateau, northwest China, to investigate the effects of VRT on soil water storage (SWS), phase crop evapotranspiration (ETc) during the pre- and post-flowering periods, dry matter accumulation, grain yields and the water use efficiency (WUE) of forage maize. The results showed that VRT significantly improved the absorption of soil moisture from deep layers, especially in dry years. During the pre-flowering period of a dry year (2020), VRT decreased SWS by 7.6%-10.0% in the 60-180 cm layer, and by 17.6%-18.5% in the 180-300 cm layer, respectively, compared to DT and TT. As a result, VRT increased ETc during the pre-flowering period by 6.1% and 9.2%, respectively. In wet years (2021 and 2022), VRT increased total ETc by 2.0%-7.9% in 2021, and by 10.1%-14.9% in 2022, respectively. On average, VRT increased the dry matter weight per plant by 1.0%-7.8%, grain yields by 2.4%-38.6%, biomass yields by 3.4%-16.2%, and WUE by 10.1%-30.0%, respectively. Particularly, the benefit of VRT for increasing yields and WUE was more noticeable in dry years. It can be concluded that VRT is a drought-tolerant and yield-boosting tillage technique that is suitable for rain-fed forage maize in semiarid areas of Loess Plateau, northwest China.

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