论文部分内容阅读
通过“3414”田间肥效试验研究了氮、磷、钾肥施用量在早稻、晚稻之间的合理配比及对产量和养分吸收利用的影响。结果表明,早稻增施钾肥、晚稻增施氮肥增产效应明显,早稻施K2O 112.5 kg/hm2和晚稻施纯N 247.5 kg/hm2时可分别获得最高产量,分别为5 974 kg/hm2和8 627 kg/hm2,增产率分别为10.9%和29.3%。早稻的肥料利用率结果显示,在不同施氮水平下,早稻施纯N 165.0 kg/hm2时的氮肥贡献率和氮肥农学利用率最高,分别为13.8%和4.9 kg/kg;在不同施磷水平下,施P2O530.0 kg/hm2时的磷肥贡献率和磷肥农学利用率最高,分别为5.9%和11.5 kg/kg;在不同施钾水平下,施K2O 112.5 kg/hm2和37.5 kg/hm2时的钾肥贡献率和钾肥农学利用率分别达到最高,为9.9%和7.9 kg/kg。晚稻的肥料利用率结果显示,在不同氮水平下,晚稻施纯N 247.5 kg/hm2时的氮肥贡献率最高,为22.7%,施纯N 165.0kg/hm2时的氮肥农学利用率最高,为9.9 kg/kg;在不同施磷水平下,施P2O560.0 kg/hm2时的磷肥贡献率最高,为7.1%,施P2O530.0 kg/hm2时的磷肥农学利用率最高,为11.7 kg/kg;在不同施钾水平下,施钾75.0 kg/hm2时钾肥贡献率和钾肥农学利用率最高,分别为9.9%和11.0 kg/kg。
Through the “3414” field fertilizer efficiency test, the effects of nitrogen, phosphorus and potassium fertilizers application rate on early rice and late rice ration and their effects on yield and nutrient absorption and utilization were studied. The results showed that the increasing yield of early-rice and late-growth rice were obvious, and the highest yields were achieved when K2O was 112.5 kg / hm2 in early rice and N 247.5 kg / hm2 in late rice were respectively 5 974 kg / hm2 and 8 627 kg / hm2, yield increase rates were 10.9% and 29.3% respectively. The results of fertilizer use efficiency of early rice showed that under the different nitrogen application rates, nitrogen fertilizer contribution rate and nitrogen fertilizer agronomic utilization rate were 13.8% and 4.9 kg / kg, respectively, at N 165.0 kg / hm2, , P2O530.0 kg / hm2 was the highest, accounting for 5.9% and 11.5 kg / kg, respectively. When applying K2O 112.5 kg / hm2 and 37.5 kg / hm2 under different K levels, The contribution rate of potash and the rate of agronomic utilization of potash reached the highest respectively at 9.9% and 7.9 kg / kg. The results of fertilizer use efficiency of late rice showed that nitrogen fertilizer had the highest contribution rate of 22.7% at N 247.5 kg / hm2 and N fertilizer application rate of N at the rate of 165.0 kg / hm2 was 9.9% kg / kg. Under the different application levels of phosphorus, P2O5 60.0 kg / hm2 had the highest contribution rate of 7.1%, and P2O530.0 kg / hm2 had the highest rate of 11.7 kg / kg. Under different K levels, K fertilizer application rate and K fertilizer application efficiency were the highest at 75.0 kg / hm2 application rate, which were 9.9% and 11.0 kg / kg, respectively.