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| Effects of potato starch processing juice on soil nutrient contents and alfalfa growth |
| Received:September 28, 2021 |
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| KeyWord:potato starch processing juice;soil nutrient;alfalfa;irrigation amount;principal component analysis |
| Author Name | Affiliation | E-mail | | JIA Yuanchao | School of Agriculture, Ningxia University, Yinchuan 750021, China | | | BI Jiangtao | School of Ecological Environment, Ningxia University, Yinchuan 750021, China | bi_jt@nxu.edu.cn | | CAO Xuehai | Ningxia Pengyang County Seed Management Station, Pengyang 756599, China | | | SUN Quan | School of Agriculture, Ningxia University, Yinchuan 750021, China | | | MAO Ruifan | School of Agriculture, Ningxia University, Yinchuan 750021, China | | | HUI Zhibing | School of Agriculture, Ningxia University, Yinchuan 750021, China | | | LIU Peng | School of Agriculture, Ningxia University, Yinchuan 750021, China | |
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| Abstract: |
| This study aimed to elucidate the effects of potato starch processing juice on soil nutrient contents and alfalfa growth, and to provide a theoretical basis for the utilization of this juice as a renewable resource. In order to evaluate the effect of potato starch processing juice on soil fertility and plant growth and development, five different irrigation treatments were set up using alfalfa as test species：CK （clean water）, T1（75 m3 · hm-2）, T2（150 m3 · hm-2）, T3（225 m3 · hm-2）, and T4（300 m3 · hm-2）. The results showed that potato starch processed juice could promote soil nutrient accumulation and alfalfa growth in a concentration-dependent manner. Compared to the values of CK, under a juice irrigation amount of 300 m3·hm-2 the soil organic matter content, alkaline hydrolysis of nitrogen, available phosphorus content, quick-acting potassium content, fresh alfalfa yield, hay alfalfa yield, chlorophyll content, and crude protein content increased by 22.25%, 46.90%, 20.47%, 10.01%, 160.29%, 165.31%, 29.61%, and 6.97%, respectively. Moreover, at an irrigation amount of 225 m3· hm-2, the height of alfalfa plants increased by 38.06% and the relative feeding value by 36.54%. Finally, at an irrigation amount of 75 m3· hm-2, the crude ash content was reduced by 3.25% and the crude fat content was increased by 0.68%. By using principal component analysis and integrating data on soil nutrients and plant properties, an irrigation amount of 300 m3 · hm-2 was deemed to be optimal. In conclusion, irrigation with potato starch processing juice can promote soil nutrient properties and alfalfa growth, allowing to make valuable and effective use of this waste resource. |
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