第三单元 第二章 第一节 种子的萌发 Flashcards

1
Q

种子萌发的环境条件

A

适宜的温度、一定的水分、充足的空气

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2
Q

早春播种以地膜覆盖的作用是?

A

保持适宜的温度

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3
Q

浸种的作用是?

A

提供一定的水分

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4
Q

松土的作用是?

A

提供充足的空气

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5
Q

种子萌发的自身条件

A

完整的活的胚、储藏丰富的营养、度过休眠期

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6
Q

描述种子萌发的过程

A

种子吸收水分,子叶或胚乳中的营养转运给胚芽、胚轴、胚根,胚根最先突破种皮,发育成根,胚轴伸长,发育成连接茎与根的部分,胚芽发育成茎和叶。

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7
Q

计算发芽率的公式

A

发芽率=发芽种子数/供检测种子数× 100%

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