摘要
应用二次饱和D -最优设计研究了银川平原白菜茬种植水稻的氮磷肥合理施用量。结果表明 ,氮肥是水稻产量构成的主要影响因子 ,施氮肥在株高、穗长、穗粒数、穴穗数等各项生育指标方面都有显著增长 ,但高氮肥力及生育后期连续阴雨天使成穗率和千粒重低 ,实际产量受影响。单施磷肥赔本 ,单施高量氮肥净收益也不高 ,应实行氮磷配合 ,并适量施肥 ,水稻最高产量施氮量为 11.6kg 6 6 6 .6 7m2 ,施磷量为 3.6 4kg 6 6 6 .6 7m2 ;最大利润施氮量为 11.2kg 6 6 6 .6 7m2 ,施磷量为3.17kg 6 6 6 .6 7m2 。
Studied on the rational application of N, P fertilizers on paddy rice in Yinchuan alluvial plain by means of Quadratic Saturated D-Best Design. The results show that nitrogen is the key construction factor of rice yield. The height of stalk, the length of ear, the granulates of ear and the ears of every stem are increased notably. Applying P fertilizer only was run a business at a loss. The income is low by applying high quantity of N fertilizer. It was needed to applying N and P fertilizers coordinately and rationally. The amount of highest yield of N fertilizer should be 11.6kg/666.67m 2.The amount of highest yield P fertilizer should be 3.64kg/666.67m 2. The amount of maximum profit of N fertilizer should be 11.2kg/666.67m 2?
出处
《宁夏农学院学报》
2002年第3期5-7,共3页
Journal of Ningxia Agricultural College
关键词
水稻
氮
磷
施用量
氮磷配比
paddy rice N fertilizer P fertilizer applied N and P fertilizer coordinatedly.
