2020 Soilless Culture(Northwest A&F University) 最新满分章节测试答案

文章目录[隐藏]

Chapter 1 Overview Chapter 1 Overview(1)
【作业】Chapter 1 Overview Chapter 1 Overview(2)
Chapter 2 Nutrient solution Chapter 2 Nutrient solution(1)
【作业】Chapter 2 Nutrient solution Chapter 2 Nutrient solution(2)
Chapter 3 The solid medium of soilless cultivation Chapter 3 The solid medium of soilless cultivatio
【作业】Chapter 3 The solid medium of soilless cultivation Chapter 3 The solid medium of soilless cultiv
Chapter 4 Nursery raising technology of Soilless Cultivation Chapter 4 Nursery raising technology of
Chapter 5 Facilities and management technology of soilless cultivation Chapter 5 Facilities and ma
Chapter 6 Vegetable soilless cultivation technology Chapter 6 Vegetable soilless cultivation technol

本答案对应课程为:点我自动跳转查看
本课程起止时间为:2020-12-09到2021-02-09
本篇答案更新状态:已完结

Chapter 1 Overview Chapter 1 Overview(1)

1、问题:In 1840, __, a German chemist, put forward mineral nutrition theory of plants taking minerals as nutrition, which laid a theoretical foundation for scientific soilless cultivation.
选项：
A:Wigman
B:Boussingault
C:Liebig
D:Sax
答案: 【Liebig  】

2、问题:American scientists_ showed the necessity of adding trace elements based on the results of experiments, and released the standard formula of nutrient solution accordingly.
选项：
A:Wigman and Boussingault
B:Boiussingault and Anon
C:Sax and Norbert
D:Hoglaland and Anon
答案: 【Hoglaland and Anon】

3、问题:Common solid medium of soilless cultivation include ( ).
选项：
A:grass charcoal
B:perlite
C:rock wool
D:gravel
答案: 【grass charcoal   ;
perlite ;
rock wool   ;
gravel】

4、问题:Depending on the fact whether the cultivation beds are applicable to solid medium materials, the soilless cultivation is divided into ( ) and ( ).
选项：
A:hydroponic cultivation
B:soil medium cultivation
C:non-solid medium cultivation
D:aeroponic cultivation
答案: 【soil medium cultivation ;
non-solid medium cultivation   】

【作业】Chapter 1 Overview Chapter 1 Overview(2)

1、问题:What are the advantages of soilless cultivation?
评分规则: 【 (1) Save water and fertilizer with high yield. (2) Clean and sanitary production without pollution.
(3) Save labor and easy management.
(4) Avoid continuous cropping barriers.
(5) Be Free from regional restrictions and in full use of space.
(6) Be conducive to agricultural modernization
】

2、问题:What are the disadvantages of soilless cultivation?
评分规则: 【 (1) Soilless cultivation technology requires high investment in equipment. Various kinds of nutrient solution are needed to irrigate crops.
(2) Cost of fertilizer for preparing nutrient solution is high.
(3) Management is difficult, and diseases spread fast.
(4) Hydroponic cultivation of soilless cultivation has poor buffer capacity, so water and fertilizer must be supplied adequately.
】

3、问题:What can the soilless cultivation be applied?
评分规则: 【 (1) Vegetable cultivation for pollution-free green food
(2) Flower cultivation
(3) Medicinal plants cultivation
(4) Fruit trees cultivation
(5) Soilless nursery
】

4、问题:According to the knowledge you’ve learned, please give an objective evaluation on the advantages and disadvantages of soilless cultivation and make a prediction about the prospect of soilless cultivation.
评分规则: 【 The soilless cultivation technology will dramatically reduce the water consumption for cultivating vegetables(It will be OK if the answers make sense.)
enlarge the land area, relieve people-land contradiction(It will be OK if the answers make sense.)
reduce the use of pesticides and chemical fertilizers(It will be OK if the answers make sense.)
mitigate environmental pollution(It will be OK if the answers make sense.)
overcome the barriers of continuous cropping in greenhouse, improve the vegetable quality and greatly improve the economic benefits, thus it has vast potential for future development. (It will be OK if the answers make sense.)
】

Chapter 2 Nutrient solution Chapter 2 Nutrient solution(1)

1、问题:Water hardness for nutrient solution shall be no more than _.
选项：
A:8°
B:10°
C:15°
D:20°
答案: 【15° 】

2、问题:Mother solution C of nutrient solution mainly contains ______.
选项：
A:iron and trace elements
B:zinc and trace elements
C:magnesium and trace elements
D:copper and trace elements
答案: 【iron and trace elements 】

3、问题:Artificial oxygenation methods of nutrient solution includes: ____.
选项：
A:mixing
B:interval solution feed
C:circular flow
D:drip irrigatio
答案: 【mixing   ;
interval solution feed ;
circular flow  ;
drip irrigatio】

4、问题:The main trace elements formulas include__.
选项：
A:Fe
B:B
C:Mn
D:Zn
答案: 【Fe ;
B ;
Mn ;
Zn】

【作业】Chapter 2 Nutrient solution Chapter 2 Nutrient solution(2)

1、问题:Please briefly describe rules for raw compounds selection when preparing nutrient solution.
评分规则: 【 High element content
high solubility
high purity
no toxicity
low price
】

2、问题:Please briefly explain the methods to replenish the dissolved oxygen for nutrient solution.
评分规则: 【 Natural spread of air into nutrient solution;
artificial oxygenation;
mixing of nutrient solution;
spread of air into nutrient solution directly in the form of small bubbles with the help of compressed air pump.
】

3、问题:What are the requirements on the water quality for nutrient solution?
评分规则: 【 Hardness: less than 10 ° and no more than 15 °;
pH value;
dissolved oxygen;
no too much suspended solids or NaCl;
no harmful microorganisms; no out-of-limit heavy metals and harmful elements.
】

4、问题:How to prepare nutrient solution？