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我站和县公司遵照毛主席关于“放手发动群众,一切经过试验”的教导,本着“管供应,管使用”的原则,三年来对合理施用化肥开展了多点试验,现将部分结果综述于下。保氮措施目前占氮肥总量80%左右的碳铵(碳酸氢铵)和氨水,易挥发流失,因此,在施用上应注意采取保氮措施。据29个试验点对比,在粘土和壤地上,碳铵埋施比撒施浇水的平均增产10.3%。埋施深度,以3寸左右为宜。重粘土可稍深,但不能过深。沙土地因保肥保水能力差,不宜深施,据试验,采取分次少量撒施后及时浇水,比埋施增产8.32%。
In accordance with the principle of “letting go and mobilize the masses, all tests have been carried out”, our station and the county company conducted a number of tests on the rational application of chemical fertilizers in the past three years based on the principle of “controlling the supply and using the pipes”. Now we will summarize some of the results In the next. Nitrogen retention measures currently account for about 80% of the total amount of ammonium nitrogen ammonium bicarbonate (ammonium bicarbonate) and ammonia, volatile loss, therefore, should pay attention to the application of nitrogen retention measures. According to the comparison of 29 test points, the average yield of ammonium bicarbonate was 10.3% higher than that of watering on clay and soil. Buried depth to 3 inches is appropriate. Heavy clay can be slightly deeper, but not too deep. Sandy soil due to poor fertilizer and water retention, should not be applied, according to the test, take a small amount of time after the sprinkling timely watering, than the burial yield 8.32%.