论文部分内容阅读
通过2年试验,分析了在吉林省土壤与气候条件下,氮肥用量与水稻产量的关系。得出了氮肥在40-240kg／hm2用量条件下,增产20．17％-150．72％,每kg氮肥增产0．0167-0．0327t稻谷,增产率为0．45％-0．94％。高产处理中(9．35-9．68t／hm2),有6．95％-8．47％的产量来自于磷、钾肥贡献,纯氮肥贡献率53．82％-55．94％,土壤基础肥力贡献率37．11％-37．71％。通过试验可以看出,氮肥用量160-200kg／hm2,增产率较高,每kg氮肥可以增产0．0318-0．0327t稻谷。氮肥施用水平低于80kg／hm2或高于200kg／hm2,氮肥增产率下降。在磷、钾肥固定的条件下,最高产量的氮肥施肥量为205．54-210．95kg／hm2,产量可以达到8．99-9．12t／hm2。
Through 2 years of experiment, the relationship between the amount of nitrogen fertilizer and the rice yield was analyzed under the soil and climatic conditions in Jilin Province. The results showed that under the condition of 40-240kg / hm2, the yield of nitrogen increased 20.17% -150.72%, and the yield of 0.0167-0.0327t paddy per kilogram of nitrogen fertilizer was increased by 0.45% -0.94% . The high-yield treatment (9.35-9.68t / hm2), 6.95% -8.47% yield from phosphorus and potassium contribution, the contribution of pure nitrogen fertilizer 53.82% -55.94%, soil foundation Fertility contribution rate 37.11% -37.71%. It can be seen through the test that the amount of nitrogen fertilizer 160-200kg / hm2, higher yield, nitrogen fertilizer per kg can increase 0.0318-0.0327t rice. The nitrogen application rate is lower than 80kg / hm2 or higher than 200kg / hm2, and the yield of nitrogen fertilizer decreases. Under the condition of fixed phosphorus and potash fertilizer, the highest yield of nitrogen fertilization was 205.54-210.95kg / hm2 and the yield could reach 8.99-9.12t / hm2.