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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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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