一般说,稻、麦在正常气候条件下,年度之间的产量大体上是稳定的。在栽培上,高密度高肥量或低密度低肥量都难夺高产。那么基本苗和氮素用量以何种关系影响产量,这是很值得研究的课题。 1989年,笔者在浙江省临海市讯桥以大麦、早稻(二九丰)进行了试验。试验土样经临海市农科所化验:有机质2.79％,速效 Generally speaking, the annual output of rice and wheat is generally stable under normal climatic conditions. In cultivation, high-density high-fat or low-density low-fat are hard to win high yield. Then the basic seedlings and nitrogen consumption in which relationship affect the yield, which is worth studying. In 1989, the author experimented with barley and early rice (29 Feng) in Linqiao, Zhejiang Province. Soil samples tested by Linhai Agricultural Institute: 2.79% organic matter, available