枸杞（Lycium barbarum L.）是一种常见的中药材和食品添加剂，也是一种观赏植物。许多人喜欢种植枸杞，但他们常常面临一个问题：为什么枸杞会落叶？下面我将解释这个问题。

首先，我们需要了解枸杞的生长习性。枸杞是一种落叶灌木植物，它属于短日照植物，对光周期非常敏感。在夏季长日照的条件下，枸杞一般会保持绿叶；而在秋季，当白天时间逐渐缩短，进入到短日照状态时，枸杞就会开始落叶。

Secondly, the dropping of leaves is a natural process for many plants, including the goji berry. As the days become shorter and temperatures drop in autumn, the plant prepares for dormancy. One of the ways it does this is by shedding its leaves, which helps conserve energy and protect against the cold.

其次，叶片的光合作用需要阳光提供能量。随着秋季来临，阳光逐渐减少，枸杞的叶片就无法获得足够的能量进行光合作用。因此，植物为了避免能量消耗过大，选择将叶片逐渐脱落。

Thirdly, the dropping of leaves in goji berry plants is also influenced by environmental factors such as temperature and water availability. In colder regions, the temperature drop can trigger leaf senescence and subsequent leaf shedding. Similarly, if the plant experiences drought or water stress, it may shed its leaves to conserve water and reduce transpiration.

第三，枸杞的叶片脱落还受到温度和水分可利用性等环境因素的影响。在较寒冷的地区，气温的下降可以诱导叶片衰老和脱落。同样地，如果植物经历干旱或水分胁迫，它可能会脱落叶片以节省水分和减少蒸腾作用。

It's important to note that while goji berry plants may shed their leaves in autumn, this is a normal part of their life cycle and not necessarily a cause for concern. The plants will typically regrow their leaves when conditions become more favorable, such as in spring when temperatures rise and days become longer.

值得注意的是，虽然枸杞在秋季会落叶，但这是它们生命周期中的正常现象，不一定需要担心。当条件变得更有利时，例如在春季气温回升、白天变长时，枸杞通常会重新长出叶子。

In conclusion, the dropping of leaves in goji berry plants is a natural response to changes in light, temperature, and water availability. It is an adaptive mechanism that allows the plant to conserve energy, protect against cold temperatures, and cope with environmental stress. So, if you notice your goji berry plants shedding their leaves in autumn, there is no cause for alarm – it's just a sign that the plant is entering a dormant phase and will regrow its leaves in due time.

总之，枸杞植物叶片脱落是对光照、温度和水分可利用性变化的自然反应。这是一种适应性机制，使植物能够节省能量、抵御寒冷温度并应对环境压力。因此，如果你注意到你的枸杞植物在秋季脱落叶子，不必担心——这只是植物进入休眠期的迹象，它将会在适当的时候重新长出叶子。

Translation:

枸杞（Lycium barbarum L.）is a common medicinal herb and food additive, as well as an ornamental plant. Many people enjoy growing goji berries, but they often face a question: why do goji berries shed their leaves? In this article, I will explain this phenomenon.

Firstly, we need to understand the growth habits of goji berries. Goji berries are deciduous shrubs and are short-day plants, meaning they are very sensitive to the length of daylight. Under long daylight conditions in summer, goji berries usually maintain green leaves, but in autumn, as the days gradually become shorter, they start shedding their leaves.

Secondly, leaf shedding is a natural process for many plants, including goji berries. As the days become shorter and temperatures drop in autumn, the plant prepares for dormancy. One way it does this is by shedding its leaves, which helps conserve energy and protect against the cold.

Thirdly, the dropping of leaves in goji berries is also influenced by environmental factors such as temperature and water availability. In colder regions, the temperature drop triggers leaf senescence and subsequent shedding. Similarly, if the plant experiences drought or water stress, it may shed leaves to conserve water and reduce transpiration.

It's important to note that while goji berry plants may shed their leaves in autumn, this is a normal part of their life cycle and not necessarily a cause for concern. The plants will typically regrow their leaves when conditions become more favorable, such as in spring when temperatures rise and days become longer.

In conclusion, the dropping of leaves in goji berry plants is a natural response to changes in light, temperature, and water availability. It is an adaptive mechanism that allows the plant to conserve energy, protect against cold temperatures, and cope with environmental stress. So, if you notice your goji berry plants shedding their leaves in autumn, there is no cause for alarm – it's just a sign that the plant is entering a dormant phase and will regrow its leaves in due time.