| Response of potato root exudate components to different planting patterns |
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| DOI：10.7606/j.issn.1000-7601.2018.04.12 |
| Key Words: potato planting pattern root exudates extraction and identification |
| Author Name | Affiliation | | TAN Xue-lian | Institute of Dryland Agriculture, Gansu Academy of Agricultural Sciences, Key Laboratory of Efficient Utilization of Water in Dry Farming, Gansu Province, Lanzhou， Gansu 730070 | | GUO Tian-wen | Institute of Dryland Agriculture, Gansu Academy of Agricultural Sciences, Key Laboratory of Efficient Utilization of Water in Dry Farming, Gansu Province, Lanzhou， Gansu 730070 | | MA Ming-sheng | Institute of Dryland Agriculture, Gansu Academy of Agricultural Sciences, Key Laboratory of Efficient Utilization of Water in Dry Farming, Gansu Province, Lanzhou， Gansu 730070 | | ZHANG Ping-liang | Institute of Dryland Agriculture, Gansu Academy of Agricultural Sciences, Key Laboratory of Efficient Utilization of Water in Dry Farming, Gansu Province, Lanzhou， Gansu 730070 |
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| Abstract: |
| To explore the methods to reduce the continuous cropping obstacles, potato root exudate components were extracted and identified from three planting patterns of potato rotation with soybean, fixed intercropping of potato and soybean and continuous potato cropping. The results showed that compared with continuous potato cropping, root exudate components of fixed intercropping of potato and soybean and continuous potato cropping increased 13.79% and 17.24% respectively. Relative alkane contents increased by 52.17% and 52.60% respectively, and relative contents of organic acids increased by 65.41% and 14.79% respectively. 1.46% of ethylamine, 2.87% of n-ethyl morpholine, and 5% of dibutyl phthalate were assayed in the root exudates from continuous potato cropping, while nothing above was detected in rotation with soybean and fixed intercropping of potato and soybean. The contents of N,N-diethyl-acetamide were 123.29% and 47.95% higher , hexadecanoic acid were 23.18% and 40.00% higher, octadecanoic acid were 27.36% and 39.80% higher in fixed intercropping of potato and soybean and continuous potato cropping, compared with potato rotation with soybean. These indicated that potato rotation with soybean can reduce the variety and content of the potato root exudate components. Therefore, it can overcome the toxic effects due to the accumulation of a certain type of potato allelochemicals by the potato rotation with soybean in the production practice. |
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