| Effects of different intercropping patterns on protective enzyme activities in leaves and yield of potato |
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| DOI：10.7606/j.issn.1000-7601.2019.06.20 |
| Key Words: intercropping potato oat antioxidant enzyme system yield |
| Author Name | Affiliation | | YANG Nana | College of Agronomy, Ningxia University, Yinchuan, Ningxia 750021, China | | WU Na | College of Agronomy, Ningxia University, Yinchuan, Ningxia 750021, China | | LIU Jili | Research Institute of Environmental Engineering, Ningxia University, Yinchuan, Ningxia 750021, China | | YANG Yaya | College of Agronomy, Ningxia University, Yinchuan, Ningxia 750021, China | | HE Jinhong | College of Agronomy, Ningxia University, Yinchuan, Ningxia 750021, China | | CAI Ming | College of Agronomy, Ningxia University, Yinchuan, Ningxia 750021, China | | QI Lizhong | College of Agronomy, Ningxia University, Yinchuan, Ningxia 750021, China | | ZHANG Pei | Jinyang Gongxue, Tongchuan, Shaanxi 727100, China |
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| Abstract: |
| In the mountainous area of Southern Ningxia, a potato and oat field trial was carried out with the ratio of rows of potato (P) and oat (O) intercropping \[2∶2 (P2O2), 4∶2 (P4O2), 4∶8 (P4O8)\] and single potato as control to study the effect of various intercropping on protective enzyme activity of leaves and yield of potato in 2016 and 2017. The results of two years of experiments showed that P4O8 significantly increased catalase (CAT) and peroxidase (POD) over other intercropping treatments (P<0.05). Superoxide dismutase in potato leaves (SOD) was the highest at tuber formation stage and the malondialdehyde (MDA) in intercropped potato leaves was higher than that with monoculture during the whole growth period (P<0.05). Compared with monoculture, the intercropping promoted potato protective enzymes, POD and CAT, activities. Compared with the single crop, intercropping P4O2 increased the number of commercial potatoes and reduced the number of small potatoes, which significantly increased the yield (P<0.05). Correlation analysis showed that POD, CAT, and SOD were positively correlated with potato yield during the whole growth period of potato. The MDA was negatively correlated with potato yield. The higher the degree of membrane lipid peroxidation in potato functional leaves, the more unfavorable the growth and development of the potato. The potato glutinous oats had certain advantages, and the land equivalent ratio of each intercropping treatment was greater than 1, which indicated that the intercropping efficiency was higher than that of the single cropping. The intercropping group P4O2 had the largest land equivalent ratio (LER), which was 1.21, followed by the intercropping group P4O8. Comprehensively, in the potato\|oat intercropping production practice, a 4∶2 (P4O2) intercropping mode was appropriate for the potato∶oat row ratio. |
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