| This article has been：Browse 378Times Download 711Times |
scan it! |
|
|
| DOI：10.13522/j.cnki.ggps.2025085 |
|
| Benefits of autumn tillage and irrigation on soil water retention, salt regulation, and nitrogen availability in the following year |
|
JING Xiangchong, LI Ruiping, FAN Liquan, ZHANG Yin
|
|
1. College of Water Conservancy, Civil Engineering, Inner Mongolia Agricultural University, Hohhot 010018, China;
2. State Key Laboratory of Water Engineering Ecology and Environment in Arid Area,
Inner Mongolia Agricultural University, Hohhot 010018, China
|
| Abstract: |
| 【Objective】In salinized irrigation areas, soil water availability and salt content in early spring are key constraints for crop establishment and yield, especially after winter freeze-thaw cycles in the following year. Autumn tillage and irrigation are techniques to manage soil water, salt and nitrogen dynamics. This paper shows how different autumn tillage and irrigation methods influence soil water retention, soil salinity and nitrogen dynamics after the freeze-thaw period, aiming to provide an optimal agronomic practice for salinized regions.【Method】The field experiments were conducted in a spring maize field at the Hetao Irrigation District. It compared three autumn tillage methods - no tillage (MG), conventional tillage (FG) and tillage with laser leveling (FP). Each tillage had two irrigation treatments, irrigating 1 500 m3/hm2 and 2 000 m3/hm2 of water. During the experiment, we measured soil moisture, soil salinity, soil ion composition and soil nitrogen content in the following spring. A comprehensive evaluation index system was developed, encompassing economic, soil improvement, and socio-ecological benefits, to evaluate all treatments. The AHP-entropy weight method combined with the TOPSIS model was used to rank the performance of all treatments.【Result】Irrigating 1 500 m3/hm2 of water combined with tillage coupled with laser levelling gave the highest spring maize seedling emergence rate (94.53%), net income (23 893.5 yuan/hm2), and comprehensive evaluation score (0.678). 【Conclusion】The optimal autumn irrigation and tillage for salinized soils in the Hetao Irrigation District was 1 500 m3/hm2 and tillage coupled with laser leveling. This offers the best balance between soil improvement, economic return, and ecological benefit for maize production in the region. |
| Key words: Hetao Irrigation District; autumn ploughing measures; autumn pouring quota; spring sowing control; comprehensive benefit evaluation |
|
|
