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| Spatial response of walnut oil content to ecological factors |
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| DOI： |
| KeyWord:walnut oil content ecological factor spatial response |
| FundProject:山西省重点研发计划（2016010301100398)；国家级大学生创新创业训练项目（G201910022004） |
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| Abstract: |
| To study the influence of ecological factors on the oil content of walnut from Shanxi province，the oil contents of 174 walnut samples from 10 cities in Shanxi province were determined and the corresponding meteorological data were collected, and the spatial autocorrelation analysis and geographic weighted regression model were used to explore the spatial correspondence of walnut oil content to ecological factors including annual average precipitation, annual average temperature, average temperature in June, July, August, frost-less period, etc. The results showed that extremely significant negative correlation was observed between walnut oil content and the annual average temperature (r=-2.288 4); the walnut oil content was negatively and significantly correlated with average temperature in July and the frost-less period (r=-3.990 5, r=-0.037 1); extremely significant positive correlation was observed between walnut oil content and average temperature in August (r=6.912 3). The negative influence degree of annual average temperature and average temperature in July increased from north to south. The average temperature in August had decreasing positive contribution to walnut oil content from north to south. The dependent degree of frost-less period also decreased from east to west in Shanxi province. The lower annual average temperature, the lower average temperature in July, the higher average temperature in August and the shorter frost-free period could significantly increase the oil content of walnut. |
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