紧凑大穗型小麦9t/hm^2氮磷钾最佳用量与配比的试验研究

Study on NPK's Suitablest Amount Applied and Proportion of the Yield 9t/hm 2 of Compact and Macrospike Type Winter Wheat

根据二次通用旋转回归设计试验结果，建立了氮磷钾三要素与公顷产量关系的数学模型；得出了三者对产量的影响为磷肥〉氮肥〉钾肥；模似筛选出获得９ｔ／ｈａ时最佳经济施肥量是纯Ｎ２５８～２６５ｋｇ／ｈｍ２、Ｐ２Ｏ５１４５～１４８ｋｇ／ｈｍ２、Ｋ２Ｏ１７８～１８３ｋｇ／ｈｍ２，三者之比为１：０．５６：０．６９；同时，明确了氮磷钾对产量构成因素的影响是穗粒数＞穗数＞千粒重，故在产量构成因素中应以穗粒数为主攻因素，以充分发挥紧凑大穗型小麦穗大粒多的增产优势，其次才是穗数和千粒重。

The mathematic model of the tree-factor of NPK and yield/hm 2 is established on the second power of current revolve regression analysis.The NPK order affecting yield is P fertiliger>N fertiliyer>K fertiliyer. The suitablest amount applied of the yield 9t/hm 2 follows: N 258～265kg/hm 2,P 2O 5 145～148kg/hm 2,K 2O 178～183kg/hm 2. The amout applied NPK affects yield factors.The resuct is the amount of spikegain>the amount of spike>the weight-thousand-gain. So the first factor of yield is the amount of spikegain,the second factor is the amount of spike and the third the weight-thousand-gain.