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选用郑单958为材料,研究不同深松方式和氮肥运筹对玉米生长发育及光合特性的影响。结果表明,深松后玉米生育后期维持较高叶面积指数(LAI)时间较长,延缓了叶片衰老,促进了干物质积累,不同深松处理间差异不明显;增加氮肥施用次数LAI下降减缓,干物质积累量的峰值减小;隔行深松与行行深松均提高玉米叶片的最大净光合速率,较不深松分别提高9.93%和2.12%。在施氮次数处理中,1/3氮肥于苗期作种肥、2/3于拔节期作追肥施入处理净光合速率最大;深松处理间产量差异不显著,增加氮肥施用次数增产效果十分显著;深松方式与等量氮肥施用次数间存在显著交互效应,隔行深松且施氮以种肥、拔节肥、灌浆肥各占总量1/3的处理产量最高,分别较不深松且氮肥作种肥一次施用和作种肥与拔节肥两次施用增产43.91%、17.37%。
Zhengdan 958 was chosen as material to study the effects of different subsoiling modes and nitrogen fertilizer application on the growth and photosynthetic characteristics of maize. The results showed that LAI of maize during late growth stage was longer, delayed leaf senescence and promoted the accumulation of dry matter, and there was no significant difference among different subsoiling treatments. The LAI decreased with the increase of N application times, The peak value of dry matter accumulation decreased. The maximum net photosynthetic rate of maize leaves was increased by interlaced submerged pine and submerged submerged pine, which increased by 9.93% and 2.12% respectively. In the treatment of nitrogen application, 1/3 nitrogen fertilizers were used as seed fertilizers at seedling stage, and 2/3 was the top net photosynthetic rate in topdressing stages at jointing stage. There was no significant difference in yield between treatments of subsoiling and nitrogen fertilization. Significant interaction between subsoiling method and the same amount of nitrogen fertilizer application had significant interaction effect. The interdependent subsoiling and nitrogen fertilization had the highest yield with the total amount of 1/3 of fertilizer, jointing fertilizer and grouting fertilizer, respectively, One application of nitrogen fertilizer as seed fertilizer and two kinds of application of seed fertilizer and jointing fertilizer increased yield by 43.91% and 17.37% respectively.