| Winter wheat yield and soil fertility evaluation in different ecological zones of Anhui Province |
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| DOI：10.7606/j.issn.1000-7601.2025.02.24 |
| Key Words: winter wheat yield soil fertility ecological zones Anhui Province |
| Author Name | Affiliation | | LI Wei | Crop Research Institute of Anhui Academy of Agricultural Science, Ahui Key Laboratory of Crop Quality Improvement, Hefei, Anhui 230031, China | | QIAO Yuqiang | Crop Research Institute of Anhui Academy of Agricultural Science, Ahui Key Laboratory of Crop Quality Improvement, Hefei, Anhui 230031, China | | CAO Chengfu | Crop Research Institute of Anhui Academy of Agricultural Science, Ahui Key Laboratory of Crop Quality Improvement, Hefei, Anhui 230031, China | | DING Yonggang | Crop Research Institute of Anhui Academy of Agricultural Science, Ahui Key Laboratory of Crop Quality Improvement, Hefei, Anhui 230031, China | | CHEN Huan | Crop Research Institute of Anhui Academy of Agricultural Science, Ahui Key Laboratory of Crop Quality Improvement, Hefei, Anhui 230031, China | | ZHAO Zhu | Crop Research Institute of Anhui Academy of Agricultural Science, Ahui Key Laboratory of Crop Quality Improvement, Hefei, Anhui 230031, China | | DU Shizhou | Crop Research Institute of Anhui Academy of Agricultural Science, Ahui Key Laboratory of Crop Quality Improvement, Hefei, Anhui 230031, China | | ZHANG Xiangqian | Crop Research Institute of Anhui Academy of Agricultural Science, Ahui Key Laboratory of Crop Quality Improvement, Hefei, Anhui 230031, China | | SHANG Yunqiu | Crop Research Institute of Anhui Academy of Agricultural Science, Ahui Key Laboratory of Crop Quality Improvement, Hefei, Anhui 230031, China |
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| Abstract: |
| In order to determine the characteristics of soil fertility in different ecological regions of Anhui Province and the limiting factors of soil fertility affecting the high\|yielding wheat, four winter wheat ecological regions in Anhui Province—Huaibei, Yanhuai, Jianghuai, and Yanjiang—were selected as the research areas. Using topsoil and wheat yield data from sampling sites, we analyzed the characteristics of wheat yield and soil fertility across the different ecological regions in 2023. Additionally, soil fertility quality was evaluated using empirical weights, comprehensive weights, and the Nemerow index method. The main soil fertility factors affecting wheat yield in different ecological regions were discussed. The results showed that the wheat yield from high to low was Huaibei>Yanhuai>Jianghuai>Yanjiang. Wheat yield showed highly significant positive correlation (P<0.001) with soil organic matter (SOM), total nitrogen (TN), total phosphorus (TP), alkaline nitrogen (AN), and available phosphorus (AP), and was significant positive correlation (P<0.05) with available potassium (AK). Wheat yield was highly significantly negatively correlated (P<0.001) with soil bulk density (BD). The importance order of soil fertility factors affecting wheat yield was SOM>AP>TN>TP>AN>TK>pH>BD>AK, and there was a significant positive correlation among soil nutrient indexes except TK, AK, and AN, while soil pH and BD were negatively correlated with SOM and AN. Compared with the empirical weights and Nemerow index method, the correlation coefficient between wheat yield and SFI calculated by the comprehensive weights method was the highest, and the SFI value obtained by the comprehensive weight method in the study area ranged from 0.58 to 0.89. According to the grade classification criteria, the soil fertility grade of the drought\|stubble wheat yield reaching 9.00 t·hm-2and 11.25 t·hm-2 in Huaibei and Yanhuai ecological area was grade Ⅰ, and that of the rice\|stubble wheatyield reaching 7.5 t·hm-2 and 6.00 t·hm-2 in Jianghuai and Yanjiang ecological area was grade Ⅱ and grade Ⅲ, respectively. As shown by the membership value radar map, the limiting factors of soil fertility for high wheat yield in Yanjiang were available phosphorus (AP) and soil organic matter (SOM). In the Jianghuai ecological area, the main limiting factors were bulk density (BD) and AP, while the secondary limiting factors were available nitrogen (AN) and SOM. In the Yanhuai ecological region, total phosphorus (TP) and pH were the limiting factors, whereas in the Huaibei ecological region, the limiting factors were soil pH, AP, and BD. |
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