本文選題：增溫 + 放牧��； 參考：《草業(yè)學(xué)報(bào)》2016年01期

【摘要】：青藏高原是全球氣候變暖的敏感區(qū)域之一,門源草原毛蟲作為青藏高原東北部高寒草甸的主要害蟲之一,蟲害爆發(fā)時(shí)造成牧草短缺,引發(fā)家畜口膜炎甚至死亡。因此,未來持續(xù)增溫情況下,門源草原毛蟲的表現(xiàn)對(duì)當(dāng)?shù)匦竽翗I(yè)生產(chǎn)安全至關(guān)重要。通過野外控制試驗(yàn),探討增溫(日增溫1.2℃/夜增溫1.7℃)和放牧對(duì)草原毛蟲生長發(fā)育的影響。結(jié)果表明,放牧顯著提高了幼蟲生長速率和蛹重,雌蛹增重比率約為雄蛹的2倍。增溫顯著縮短了草原毛蟲幼蟲期(雌性幼蟲4.4d、雄性幼蟲7.0d)和蛹期(雌蛹3.6d、雄蛹4.6d),而且引發(fā)雄性先熟,即雄成蟲羽化時(shí)間較雌成蟲早5.0d。增溫放牧處理下,草原毛蟲的生長速率提高9%、雌蛹增重26%�？梢�,未來持續(xù)增溫的高寒草甸牧場(chǎng),門源草原毛蟲適合度升高,對(duì)當(dāng)?shù)夭輬?chǎng)和家畜的威脅加大,需加強(qiáng)害蟲的監(jiān)控和防治力度。
[Abstract]:Qinghai-Tibet Plateau is one of the sensitive regions of global warming. As one of the main pests of alpine meadow in the northeast of Qinghai-Xizang Plateau, Menyuan grassland caterpillar caused shortage of forage and even death of livestock. Therefore, the performance of Mengyuan grassland caterpillar is very important to the safety of local animal husbandry under the condition of continuous warming in the future. The effects of increasing temperature (1.2 鈩，

本文編號(hào)：2008645