【摘要】 利用信丰脐橙园防虫网内外2020年5月至2021年4月观测的辐射资料以及信丰站日照时数资料，对比分析了网内外光合有效辐射的变化特征，通过相关分析，构建了基于日照时数的光合有效辐射估算模型，并对网内外脐橙品质进行了跟踪检测。结果表明：网内外的光合有效辐射和总辐射的变化趋势基本一致，总辐射年总日累计量网内比网外衰减33.4%，光合有效辐射年总日累计量衰减37.9%。光合有效辐射季节变化趋势网内外基本一致，夏季最大，冬季最小。光合有效辐射月平均日累计量以8月最大，12月最小。夏季光合有效辐射日变化为单峰型曲线，冬季为多峰型曲线。光合有效辐射系数具有明显的季节变化特征，网内外都表现为夏季>春/秋季>冬季。光合有效辐射与日照时数存在显著的正相关，构建的基于日照时数不同季节的光合有效辐射估算模型，经回代检验表明其拟合结果良好。经网内外脐橙品质跟踪检测表明，网内脐橙总酸和VC含量比网外明显偏高，其他品质指标变化不明显。更多还原

【Abstract】 Based on the radiation data observed inside and outside of the insect control net of Xinfeng orange orchard from May 2020 to April 2021 and the sunshine hours of Xinfeng Station, variation characteristics of photosynthetic active radiation(PAR) inside and outside of the network were compared and analyzed. Through correlation analysis, the PAR estimation model was constructed based on sunshine hours. The results showed that the change trend of photosynthetic active radiation and total radiation inside and outside net was basically the same. The annual total daily accumulative radiation attenuation in net was 33.4% compared with that outside net, and the photosynthetic active radiation attenuation was 37.9%. The seasonal variation trend of photosynthetic active radiation was basically the same inside and outside net with the maximum in summer and the minimum in winter. The monthly average daily accumulation of photosynthetic active radiation was the highest in August and the lowest in December. The diurnal variation of photosynthetic effective radiation was a unimodal curve in summer. In winter,the photosynthetic active radiation was a multi-peak curve. The apparent seasonal variation of the coefficient of photosynthetic effective radiation is observed. The order of both inside and outside net was summer>spring/autumn>winter. The correlation analysis showed that there was a significant positive correlation between photosynthetic effective radiation and sunshine duration,and the PAR estimation model based on sunshine duration in different seasons was fitted well by back-generation test. The results of the net inside and outside navel orange quality tracking detection showed that the contents of total acid and VC of navel orange inside and outside the net were significantly higher than those outside the net, and other quality indexes did not change significantly.更多还原