问题 问答题 简答题

水稻育苗期需进行哪几方面的苗床管理确?应如何管理?

答案

参考答案:

(1)温度管理。出苗前密闭保温,棚温控制在30℃左右,苗出齐后撤去地膜,至2.1叶期通过适当通风炼苗,棚温控制在25--28℃,2.5叶后棚温控制在20℃左右,严防高温烧苗或造成秧苗徒长。

(2)水份管理。浇水最好在清晨,看秧苗是否吐水在浇水,并且,浇则浇透,浇水不宜过频、过多。但是,简塑钵盘育苗,由于钵孔容量小,要随时注意苗床水份情况,及时补水。

(3)追施肥料。目前通常采用育苗调制剂,不需施肥,但是可根据苗情在移栽前2-3天酌情施用送嫁肥,以保证秧苗健康成长。

(4)防治病害。2.5叶期前后为秧田苗期的易发病时期,防治立枯病等秧田病害,及时发现,及时用药,及时防、控病害的发生。

完形填空

Why Rent Textbooks?

Textbook renting is now a new fashion among college students.    小题1:  Let’s examine carefully further and see why renting books is a cost-effective way without shelling too much money from your pocket.

Gives value for your money

 小题2: Those non-major subjects, are better acquired through renting. It saves one money and helps you give out the money you save on some other personal possessions you need in college.   小题3:  

Saves time

You can save a great deal of time when renting a textbook. Instead of browsing your way for hours trying to look for better deals online, you can simply go to a popular book renting marketplace online and just order away.

 小题4:  

User Friendly

Aside from being able to save money and time,   小题5:  Imagine trying to scan the virtual bookshelf and checking on comments of previous users and figuring out which ones got bad comments and which had great ones. It could be fun at first but if you are short of time, the process can become annoying. If you rent books, you will only be needing the book’s ISBN number and find it right away. No more time-wasting site search.

A.renting textbooks brings convenience to all users.

B.There is literally no need to skimming for hours.

C.The idea of renting one never existed since the book are affordable in libraries.

D.Research was made to find out if renting helps one save money and time rather than buying new textbooks.E. Renting textbooks allows you to save at least 50% off the standard retail price (零售价) for each item.

F. Renting textbooks is a relatively new idea for everyone, indeed.

G. You don’t have to buy all of your textbooks.

单项选择题