问题 问答题 简答题

小麦保管的主要措施有哪些?

答案

参考答案:

(1)趁热入仓密闭储藏。小麦趁热入仓密闭储藏是我国传统的储藏方法之一。根据小麦耐热性好的特点,利用盛夏高温曝晒小麦,将水分降到12.5%一下,是粮温达50-52℃,保持2h,趁热入仓,散装压盖,高温密闭,是粮温维持在40℃左右,10d左右可杀死全部害虫。此后,粮温逐渐下降与仓温平衡,即传入正常密闭储藏。高温时间过长会影响小麦的发芽率。

(2)低温冷却。粮堆保持一定的低温状态,对于延长种子寿命、保持品质有益。进入正常储藏的小麦,可在寒冷季节进行通风、翻动粮面,将粮温降至5℃以下,然后在气温回升前对仓、粮堆进行密闭,这对抑制虫、保持品质有较好的效果。长期储存的低温粮要严防与湿热气流接触,以免造成麦堆表层结露。

(3)严防害虫感染。危害小麦的主要害虫是玉米象、麦蛾、印度谷蛾等。麦蛾、印度谷蛾成虫发生在粮堆表层,活动于空间,而玉米象在秋凉后则隐藏于麦堆深处。热密闭与冷密闭储藏是防治小麦害虫的有效方法,要加强管理,严格做好防止感染害虫的工作。

阅读理解

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A. www. europa-page. Com

B.www. Spoton. de

C.www. e-pals. com

D.www. Kidfu. com 小题2:A teacher can visit            to help his/her pupils to get pen-pals.

A.KidFu

B.Europe Pages

C.e-PALS

D.spoton. community小题3:The advantage of Europe Pages is that           .

A.you can start sending your e-mails immediately

B.you can choose more pen-pals from many countries

C.it is free and you can find names of different countries

D.it is the safest one among all the web sites小题4:A chat monitor mentioned in Paragraph 2 is probably           .

A.a person in the web site to give safe online advice

B.a police officer to keep order in the chat rooms

C.an engineer in charge of controlling the chat

D.a software to keep online chatting clean and safe

单项选择题