超声波对西施舌面盘幼虫生长率及成活率的影响

实验室内用静水实验方法研究超声波对西施舌面盘幼虫生长速率、摄食率及成活率的影响。结果表明适宜条件超声辐射可提高面盘幼虫的生长速率和摄食率。在电功率为80w、频率20.4kHz条件下,超声辐射30s,幼虫日平均生长速率最快达13.67%,比对照组11.45%快2.22%.重复的超声辐射对幼虫的生长速率产生明显影响,第一次辐射后第1天各实验组面盘幼虫的生长速率都比对照组大,而辐射时间为50s实验组第1天生长速率最大达18.95%,比对照组10.23%提高8.72%。多次辐射幼虫生长速率明显减慢。

Effect of Foliar Copper Fertilizer on Pineapple cv. N36 Planted on BRIS Soil at East Coast of Peninsular Malaysia

The physical and chemical properties of BRIS soil are unsuitable for agricultural purposes. A proper fertilizer and crop management practices are required. An attempt was made to convert this land into a sustainable production land for pineapple. Therefore, the objective of the study was to determine the effect of foliar copper fertilizer on the growth and fruit quality of pineapple cv. N36, for fresh consumption planted in Entisol type BRIS soil at the east coast of Peninsular Malaysia. The complete randomized design （CRD） method with three replications was used at 0 to 6.6 kg.ha^-1 of copper sulfate. Results demonstrated that the unpleasant effect of BRIS soil on brix value was restored with copper fertilizer. The most suitable quantity of foliar copper fertilizer for pineapple cv. N36 planted in Entisol type BRIS are between 1.6 to 3.3 kg.ha^-1 of copper sulfate.

特务组织知多少?中国古代特务组织盘点

四千多年前就有了最早的特务特务几乎是伴随着政治与战争而生的,为了保护自己,战胜敌人,特务便成了一种特殊需要。特务往往是战胜敌人的“杀手锏”,打入敌人内部的定时炸弹。实际上,早在原始社会晚期的三皇五帝时期,虽然实行“禅让制”,但并不是一片祥和,炎帝和蚩尤、黄帝和炎帝、黄帝和蚩尤都曾发生大规模战争。著名的涿鹿之战与阪泉之战就发生在那个时期,那个时期有没有特务及特务组织,按逻辑来说是有的。