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Growth Response of Tartary Buckwheat to Plastic Mulching and Fertilization on Semiarid Land

文献类型： 外文期刊

作者： Fang, Yanjie 1 ; Yu, Xianfeng 1 ; Hou, Huizhi 1 ; Wang, Hongli 1 ; Ma, Yifan 1 ; Zhang, Guoping 1 ; Lei, Kangning 1 ; Yin, Jiade 1 ; Zhang, Xucheng 1 ;

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

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

关键词： hole-sown technique; dry-land agriculture; phenological period; Loess Plateau; Fagopyrum tataricum L.

期刊名称：APPLIED SCIENCES-BASEL （ 影响因子：2.7； 五年影响因子：2.9 ）

ISSN：

年卷期： 2023 年 13 卷 4 期

页码：

收录情况： SCI

摘要： Integrated hole-sowing, fertilization, and plastic mulching techniques are common agronomic practices applied to collect rainwater and to improve rainwater utilization in semiarid rain-fed regions. However, little is known about the growth responses of tartary buckwheat (Fagopyrum tataricum L.) to the practices adopted in semiarid areas of Loess Plateau in Northwest China. To address the concerns, a long-term field experiment was conducted in 2015-2017. Four fertilization levels, namely, high fertilization level (N-P2O5-K2O: 120-90-60 kg ha(-1), HF), moderate fertilization level (80-60-40 kg ha(-1), MF), low fertilization level (40-30-20 kg ha(-1), LF), and zero fertilization level (ZF), were applied to hole-sown tartary buckwheat with whole plastic mulching, in comparison to the control with no-mulching and zero fertilization (CK). Several key growth-influencing indicators were measured in the consecutive experimental years, including soil temperature (T-s), soil water storage (SWS), leaf area index (LAI), dry matter (DM), and grain yield. The results showed that in different precipitation years, 2015 (193 +/- 23 mm), 2016 (149 +/- 19 mm), and 2017 (243 +/- 28 mm), the ZF, LF, MF, and HF treatments had the potential to optimize T-s in 0 similar to 25 cm soil layers (at 5 cm interval). The four treatments improved SWS in 0 similar to 300 cm soil layers by 3.5% and increased soil water consumption in the pre-anthesis period by 22.4%, compared with CK. Moreover, the four treatments shortened the pre-anthesis growth period by 0.4 similar to 5.4 d, while extended the post-anthesis growth period by 5.7 similar to 10.0 d, giving rise to an overall extension of 0.6 similar to 5.0 d for a whole growth period of tartary buckwheat. Furthermore, the ZF, LF, MF, and HF treatments increased LAI by 4.4 similar to 225.3% and DM weight by 41.5 similar to 238.0%. The rain yield of the four treatments was increased by 14.0 similar to 130.4%, and water use efficiency (WUE) was improved by 11.3 similar to 102.7%, especially for the LF treatment, compared with CK. The study indicated that the technique of hole-sowing and plastic mulching combined with a low fertilization rate was an effective measure for tartary buckwheat to optimize crop growth and to boost grain yield and WUE on semiarid lands.

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