摘要
采用田间罩笼和人工模拟取食两种方式,分别测定了亚洲小车蝗1～3龄、4龄、5龄和成虫在虫口密度5、15、30 头/ m2下取食牧草对草地产草量的影响.结果表明:低龄期蝗虫取食对牧草有明显的超补偿生长作用,产草量增加,罩笼试验产草量高于模拟取食试验;随亚洲小车蝗龄期增加,取食量加大,草地产草量迅速下降,成虫期产草量最低.罩笼方法与模拟方法结合能真实地反应蝗虫取食与草地产草量的相互关系.
Field caging and simulated feeding were conducted to study the effects of grasshoppers of different development periods and densities on forage yield on grasslands, using the 1^st - 3^rd, 4^th and 5^th instars and adults of Oedaleus asiaticus B. Bienko with 5, 15 and 30 heads/m^2. The results showed that the forages could overcompensated the feeding by the grasshoppers of low instars, with forage yield increased, higher in field caging than in artificial simulation. With the age increase of instars, the grasshoppers＇ food intake increased, so the forage yield dropped sharply, and the forage yield at adult stage was the lowest. The combination of field caging and artificial simulation realistically showed the correlation between the feeding and forage yield on grasslands.
出处
《植物保护》
CAS
CSCD
北大核心
2005年第4期55-58,共4页
Plant Protection
关键词
农业昆虫学
亚洲小车蝗
产草量
田间罩笼
人工模拟
agricultural entomoloy
Oedaleus asiaticus B. Bienko
forage yield
field caging
artificial simulation
