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种子物理特性-容重、比重、千粒重、密度、孔隙度

Authored by 娇 管

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University

Used 4+ times

种子物理特性-容重、比重、千粒重、密度、孔隙度
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14 questions

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1.

MULTIPLE SELECT QUESTION

45 sec • 1 pt

下列哪些情况下种子的容重大?

混杂物种类、数量——大型、沉重

水分和油分含量——高

内部结构——充实致密

表面性状——圆而光滑

粒大小、整齐度—— 粒大、不整齐

2.

FILL IN THE BLANKS QUESTION

45 sec • 1 pt

一般情况下,种子水分越低,容重越 (a)  

3.

MULTIPLE CHOICE QUESTION

45 sec • 1 pt

原来品质优良的种子,可能因收获后清理不够细致,混有较多轻的杂质而使容重____

降低

升高

不变

先增加后降低

4.

FILL IN THE BLANKS QUESTION

1 min • 1 pt

油料作物种子可能因 (a)   含量特别高,容重反而较低

5.

FILL IN THE BLANKS QUESTION

45 sec • 1 pt

种子表面光滑无附属物、致密角质、脂肪少,比重 (a)  

6.

FILL IN THE BLANKS QUESTION

30 sec • 1 pt

同一品种种子,愈成熟、愈饱满,比重愈 (a)  

7.

FILL IN THE BLANKS QUESTION

45 sec • 1 pt

种子的油质越高,比重越 (a)  

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