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在施用等量底肥、分蘖肥的中部黄壤稻田内,于中后期对优质稻品种“金竹粘”采用不同追氮量,其产量及品质均发生了变化。以迫施全氮了公斤的产量为最高,追施6公斤的次之,分别较对照增产12.45％和4.16％,重施全氮9公斤则略有减产。增施氮肥是提高稻米蛋白质含量的有效途径,尤其是抽穗期施氮,效果甚为明显。追氮量与蛋白质含量呈正相关,与直链淀粉含量呈负相关。为了兼顾产量与品质,施氮水平以追施全氮3～6公斤为宜,欲求高产则中后期追施全氮3公斤为佳,为提高品质追氮量可增至6公斤,过量则导致减产。
In the middle yellow soil paddy with the same amount of base fertilizer and tillering fertilizer, the yield and quality of the high quality rice variety “Jinzhuyin” were different with different nitrogen rates. In order to force the nitrogen yield of a kilogram of the highest, followed by the top dressing of 6 kg, respectively, compared with the control yield 12.45% and 4.16%, re-applied total nitrogen 9 kg, a slight reduction. Adding nitrogen fertilizer is an effective way to increase the protein content of rice, especially when nitrogen is applied at heading stage. The amount of nitrogen uptake was positively correlated with protein content and negatively correlated with amylose content. In order to take into account the yield and quality, nitrogen level to topdressing 3 to 6 kg of total nitrogen is appropriate, high yield is required in the late pursuit of 3 kg of total nitrogen is better, to improve the quality of nitrogen up to 6 kg, excessive lead to Cut