问题 问答题 论述题

请论述植物性蛋白饲料的主要营养特点,常见植物性蛋白原料在使用过程中需要注意的问题。

答案

参考答案:

主要营养特点:

(1)蛋白质含量高,且蛋白质质量较好。

(2)粗脂肪含量变化大。

(3)粗纤维含量一般不高,基笨上与谷类籽实近似,饼粕类稍高些。

(4)矿物质中钙少磷多,且主要是植酸磷。

(5)维生素含量与谷实相似,B族维生素较丰富,而维生素A、维生素D较缺乏。

(6)大多数含有一些抗营养因子,影响其饲喂价值。

需要注意的问题:

(1)大豆及其饼粕大豆在使用时一般加热后使用,因为生大豆含有众多的营养因子,直接饲喂会造成动物下痢,饲喂价值降低。

(2)棉籽粕应当做去毒处理,保证饲喂安全。

(3)菜籽粕使用时做脱毒处理。

(4)花生饼粕极易感染黄曲霉,注意防霉。

阅读理解

Eat nuts, live longer.  Researchers have found that those who eat a handful of peanuts every day significantly decrease their risk of dying from all causes compared to those who do not eat nuts. A new study concludes that all types of nuts seem to be protective.

Researcher Ying Bao is with the Department of Medicine at Brigham and Women’s Hospital and Harvard University Medical School in Boston, Massachusetts. She and her colleagues looked at the impact of nut consumption by analyzing two huge studies that began in 1980 - the Nurses’ Health Study, which tracks the well-being of more than 76,000 women, and 42,000 men enrolled in the Health Professionals Follow-up Study.

Among the questions asked at the beginning of the studies was, 'how frequently do you eat nuts?'  The information was updated every two to four years. Bao says the participants were followed for three decades.

“What we observed is that people who eat more nuts are less likely to die over the next 30 years," said Bao. "So, for example, if a person eat(s) nuts once per day, that person has a 20 percent lower risk of dying.”

Bao says eating a handful of nuts five or more times per week was associated with a 29 percent reduced risk of dying from heart disease and an 11 percent lower risk of cancer death.  A serving size is 28 grams.

Nuts contain nutrients, including high quality proteins, vitamins and minerals, all of which have anti-cancer effects and may help protect the heart.

Bao says researchers are planning studies to find out how nuts are beneficial to human health.

The study on the health benefits of nuts was funded by the International Tree Nut Council Research and Education Foundation.

小题1:People who often eat nuts ________.

A.are more likely to live longer than people who often eat fruits

B.don’t need to go to hospital

C.may live longer than people who don’t eat nuts

D.don’t have to do sports小题2:The underlined word “well-being” in Paragraph 2 shares the same meaning as “________”.

A.illness

B.health

C.diet

D.habit小题3:About Bao’s research, which statement is true?

A.She has done the research by herself.

B.Her research was based on two studies.

C.Her research lasted about three years.

D.People should eat all kinds of nuts every day.小题4:Eating nuts may help us stay away from ________.

A.cancer

B.fever

C.flu

D.headache小题5:The passage is most probably from a journal of ___________ .

A.entertainment

B.diet

C.sports

D.science

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