论文部分内容阅读
１９８７～１９９３年连续六年肥料定位试验表明，在鲁南壤质脱潮土冬小麦—夏玉米一年两熟制中，氮肥肥效最明显，每公斤纯氮增产冬小麦１８．３ｋｇ，夏玉米２４．０ｋｇ；磷肥的肥效次之，每公斤纯磷（Ｐ２Ｏ５）增产冬小麦１２．５ｋｇ，夏玉米１１．９ｋｇ；钾肥对冬小麦暂不显效，对夏玉米有明显肥效，每公斤纯钾（Ｋ２Ｏ）增产夏玉米６．６ｋｇ。配方施肥不仅能提高冬小麦、夏玉米的产量，保持产量稳定，而且能提高土壤肥力；气候条件对冬小麦、夏玉米的产量有明显的影响
From 1987 to 1993, the experiment of fertilizer locating for six years in succession showed that nitrogen fertilizer had the most obvious effect in winter wheat-summer maize double cropping system in Lunan, with a yield of 18.3kg of winter wheat and summer maize per kg of pure nitrogen. 0kg; followed by the fertilizer efficiency of phosphorus fertilizer, per kilogram of pure phosphorus (P2O5) increase in winter wheat 12.5kg, summer corn 11.9kg; potash on winter wheat temporarily ineffective, obvious effect on summer maize, K2O per kg of summer Corn 6.6kg. Formula fertilization can not only increase the yield of winter wheat and summer maize, but also keep the yield stable and increase the fertility of soil. The climatic conditions have a significant effect on the yield of winter wheat and summer maize