土壤胶体颗粒带负电荷,因此土壤中施用含氮总量相同的下列化肥时

土壤胶体颗粒带负电荷,因此土壤中施用含氮总量相同的下列化肥时,肥效最差的是(    )

A.硫铵                B.氯化铵              

C.碳铵               D.硝酸铵

答案

D


解析:

题中所给四种化肥中的氮元素的存在形态,一是铵态氮(),二是硝态氮()。土壤胶粒带负电荷,显然,易被吸附,不能被吸附,故在施用含氮总量相同的前提下,硝酸铵肥效最差。

相关题目

 设为等比数列的前项和,,则               A.11   
 设为等比数列的前项和,,则               A.11              B.5                 C.               D.
下列事实可证明氨水是弱碱的是 A.氨水受热易分解放出氨气
下列事实可证明氨水是弱碱的是 A.氨水受热易分解放出氨气          B.能跟氯化亚铁溶液反应生成氢氧化亚铁 C.0.1mol/L氯化铵溶液pH约为5   
已知a>b>c,求证:>0.
已知a>b>c,求证:>0.
YaoMing is very famous now. However, his basketball career ________ only after
YaoMing is very famous now. However, his basketball career ________ only after many years of hard work. A. took on                           B. took off          
32.
32.
一个多边形除去一个内角外,其余各角之和等于830°,则这个
一个多边形除去一个内角外,其余各角之和等于830°,则这个角的度数为 [    ] A.70°        B.170°       C.30°        D.50°
 It is believed that if a book is _________ , it will surely _________ the rea
 It is believed that if a book is _________ , it will surely _________ the readers. A. interested; interest                         B. interesting; be interested C. interest
将下列句子变为被动语态,每空一词: 1. We can finish the work in
将下列句子变为被动语态,每空一词: 1. We can finish the work in two days.                                                The work ________

最新题目