论文部分内容阅读
对1992～1995年以不同配比施肥对木薯产量和块根淀粉含量及扣除对照和肥料成本后的毛利作统计分析，表明：①每公顷施用50kgP2O5和100kgK2O前提下，木薯产量随施N量（50～200kg）增加而增加，但块根淀粉含量则随N用量增加而下降。4a平均以每公顷施200kgN产量最高，以每公顷施50kgN经济效益最好（4a平均值）。②每公顷分施100kgN和K20前提下，P2O5施用量多少对木薯块根产量和淀粉含量没有显著影响，以施100kgN和50kgP2O5的产量稍高及效果稍好。③每公顷施100kgN和50kgP2O5的前提下，块根产量和淀粉含量及经济效益均随K2O施用量增加而增加．并达到极显著差异。以每公顷100kgK2O的效益最好（毛利达3004元），而不施在4a中产量下降35％。
The results of statistical analysis on the yield of cassava and the starch content of root tuber after 1992-2005 with gross profit after deducting the control and fertilizer cost showed that: ① Under the premise of applying 50kgP2O5 and 100kgK2O per hectare, ~ 200kg) increased, but the content of root starch decreased with the increase of N content. 4a Average 200 kgN per hectare yield the highest yield of 50kgN per hectare, the best economic efficiency (4a average). ② Under the premise of applying 100kgN and K2O per hectare, the application amount of P2O5 had no significant effect on the root yield and starch content of cassava, slightly higher yield and slightly better effect of applying 100kgN and 50kgP2O5. ③ Under the premise of applying 100kgN and 50kgP2O5 per hectare, the root yield, starch content and economic efficiency increased with the increase of K2O application rate. And reached a very significant difference. The benefit of 100kgK2O per hectare was the best (gross profit amounted to RMB3004), while the output of non-application in 4a was reduced by 35%.