冬小麦夏玉米种植模式一次性底肥的产量和效益分析

将"冬小麦+夏玉米"一年两熟制视为一系统整体来研究只施一次底肥,在保证单产不降低的前提下,节约成本,提高效益。结果表明,在滦河流域沙区土壤上冬小麦施用适量底肥,种夏玉米不施底肥,比两茬作物均施底肥两种作物的产量变化不明显,但效益却明显提高。进而提出一个较完善的平衡施肥技术方案:在上茬冬小麦,底施纯N69kg/hm2,K2O165kg/hm2,P2O5150kg/hm2,P、K肥1次性底施。在冬小麦孕穗期、拔节期分别追施纯N34 5kg/hm2,在夏玉米的小喇叭口、大喇叭口期追施纯N207kg/hm2。

Analysis on Yield and Efficiency of Only One Base Fertilizer for Winter Wheat and Summer Maize Cultivation Mode

Only once planting fertilizer will planting system of double crops, which is model of winter wheat-summer maize, be regarded as a complete system to be studied, this lowers cost and enhances its economic efficiency when average yield of per crop does not decline. The experimental result shows that although yield of the double crops is not raised obviously, there is still a remarkable economic increase when the planting fertilizer is provided for winter wheat but not for summer corn. Thus, a more perfect technological draft has been put forward as follows: To winter wheat, the volume of planting fertilizer on pure N is 69 kg/hm~2, and on P 165 69 kg/hm~2,and on K 150 kg/hm~2 . P and K planting fertilizer will be done only once. In addition, during the stage of the pregnant spiking and jointing, 34.5 pure N shall be planted, respectively. While the summer corn is in the other two stages of summer corn, 207 pure N is also planted, respectively.