Authors

Abstract

To determine the optimal harvesting period for mechanized harvesting of Lycium barbarum L. (L. barbarum), fruits from different harvest batches within the same harvesting season were used as the experimental materials, and a comprehensive evaluation was conducted based on fresh-fruit ripeness and damage resistance. Fruit weight, fruit–pedicel detachment force, firmness, soluble solids content, color difference, moisture content, and damage rate were measured on different sampling dates in two consecutive harvest batches (HP1 and HP2). Their variation patterns were analyzed, and a comprehensive evaluation model was established based on correlation analysis and principal component analysis to rank and optimize fruit quality across different sampling dates. The results showed that, with the progression of sampling dates, the ripeness of fresh L. barbarum fruit gradually increased, whereas damage resistance exhibited a stage-dependent variation pattern, and significant correlations were observed among the measured indicators. The dual-index weighted comprehensive evaluation indicated that the optimal harvesting period for both harvest batches was day 7, corresponding to an appropriate harvesting interval of 7 d. These results provide a theoretical basis for determining the harvesting period for mechanized L. barbarum harvesting.

Abstract in English

为明确适宜机械化采收的枸杞最佳采收周期，本研究以同一采收季节内不同茬次的枸杞果实为试验对象，围绕鲜果成熟度与抗损伤能力开展综合评价。通过测定连续两茬（HP1与HP2）不同采样日期果实的重量、果实-果柄结合力、硬度、糖度、色差值、含水率及损伤率等指标，分析其变化规律，并结合相关性分析和主成分分析构建综合评价模型，对不同采样日期果实品质进行排序与优选。结果表明，随着采样日期推进，枸杞鲜果成熟度逐步提高，而抗损伤能力呈阶段性变化特征，不同指标间存在较显著的相关性。双指标加权综合评价结果表明，两茬果实的最佳采收周期均为第7天，即适宜采收间隔为7 d，为枸杞机械化采收周期的判定提供了理论依据。