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> 小明家的油菜只开花不结果实,需要施加的化肥是()A.氮肥B.硼肥C.磷肥D.钾肥-七年级生物
小明家的油菜只开花不结果实,需要施加的化肥是()A.氮肥B.硼肥C.磷肥D.钾肥-七年级生物
题目简介
小明家的油菜只开花不结果实,需要施加的化肥是()A.氮肥B.硼肥C.磷肥D.钾肥-七年级生物
题目详情
小明家的油菜只开花不结果实,需要施加的化肥是( )
A.氮肥
B.硼肥
C.磷肥
D.钾肥
题型:单选题
难度:中档
来源:不详
答案
含氮的无机盐能促进细胞的分裂和生长,使枝繁叶茂;含磷的无机盐可以促进幼苗的发育和花的开放,使果实、种子提早成熟;含钾的无机盐使植物茎秆健壮,促进淀粉的形成与运输.硼是植物必需的营养元素之一,硼对受精过程的正常进行有特殊作用,因此,对防治油菜“花而不实”、棉花“蕾而不花”和果树“落蕾、落花、落果”、小麦“不稔”等症均有明显能力.
故选:B
上一篇 :
植物需要量最大的无机盐是()A.氮
下一篇 :
农作物甘蔗收获的是茎,为了增加
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题目简介
小明家的油菜只开花不结果实,需要施加的化肥是()A.氮肥B.硼肥C.磷肥D.钾肥-七年级生物
题目详情
答案
故选:B