论文部分内容阅读
12年（1987～1998）的试验表明，在三江平原漂白冷凉淋溶土上种植农作物，按传统的方法施用化肥，其增产作用小麦为24.9%～39.1%，玉米为14.2%～26.1%，大豆为13.2%～25.2%。年度之间差别较大，与水热条件有一定关系。其增产作用远低于中国平均水平（47.8%～53.0%）和世界平均水平（51.4%），这主要与施肥量、施肥时期和施肥位置有关。
Experiments for 12 years (from 1987 to 1998) showed that the crops were planted on the bleaching cool leaching soil in the Sanjiang Plain and the fertilization was carried out according to the traditional method. The yield was 24.9% -39.1% for wheat and 14.2% -26.1% for maize, Soybean 13.2% ~ 25.2%. Differences between the larger annual, and hydrothermal conditions have a certain relationship. Its yield-increasing effect is much lower than the average level in China (47.8% -53.0%) and the world average level (51.4%), mainly related to the amount of fertilizer applied, the period of fertilization and the location of fertilization.