Two experiments were conducted to determine the effects of different protein levels on the growth performance, feed efficiency and nutritional values, and phase feeding of the 2-spotted cricket (Gryllus bimaculatus de Geer). In experiment 1, 4 crude protein (CP) diets were formulated to contain 18%, 20%, 22%, or 24% CP, respectively. A sample of 7-day-old 3,600 crickets was equally divided into 24 plastic boxes (150 crickets each) in a completely randomized design with 4 diets and 6 replications. In experiment 2, 2-phase feedings were used. For starting period (days 7–18), crickets in all treatments were fed a diet containing 22% CP. During the growing period (days 19–35), 3 groups of crickets were fed diets containing 18%, 20%, and 22% CP. In the overall period of experiment 1, the crickets fed with 22% CP diet had greater body weight compared to those fed with 18% CP diet. In addition, the crickets fed with 22% CP diet had the lowest feed conversion ratio (FCR). The broken-line model indicated the growth pattern changed on day 18. In experiment 2, the crickets fed with 20% CP diet from days 19 to 35 had greater growth performance and lower FCR than those fed with 18% CP, but not different from those fed with 22% CP. In conclusion, 22% CP can increase growth performance by improving the feed efficiency of crickets. The implementation of 2-phase feedings using 20% CP, during the growing period, could be considered as a cost-effective strategy for sustainable cricket production.

中文翻译：

---

蛋白质水平对二斑蟋蟀生产性能、营养价值和阶段饲养的影响

进行了两项实验，以确定不同蛋白质水平对二斑蟋蟀 (Gryllus bimaculatus de Geer) 生长性能、饲料效率和营养价值以及阶段饲喂的影响。在实验 1 中，配制了 4 种粗蛋白 (CP) 日粮，分别含有 18%、20%、22% 或 24% CP。将 7 日龄的 3,600 只蟋蟀样本平均分为 24 个塑料盒（每个 150 只蟋蟀），采用完全随机设计，采用 4 种饮食并进行 6 次重复。在实验2中，使用了两阶段供电。在开始阶段（第 7-18 天），所有处理中的蟋蟀都喂食含有 22% CP 的饮食。在生长期（第 19-35 天），3 组蟋蟀分别饲喂含 18%、20% 和 22% CP 的饲料。在实验 1 的整个期间，饲喂 22% CP 日粮的蟋蟀比饲喂 18% CP 日粮的蟋蟀体重更大。此外，饲喂22％CP饲料的蟋蟀的饲料转化率（FCR）最低。折线模型表明生长模式在第 18 天发生变化。在实验 2 中，第 19 天至第 35 天饲喂 20% CP 日粮的蟋蟀比饲喂 18% CP 日粮的蟋蟀具有更高的生长性能和更低的 FCR，但与饲喂 18% CP 日粮的蟋蟀没有什么不同。那些喂食 22% CP 的人。总之，22%CP可以通过提高蟋蟀的饲料效率来提高生长性能。在生长期间使用 20% CP 进行两阶段饲喂可被视为可持续蟋蟀生产的具有成本效益的策略。