新修水平梯田春小麦氮磷化肥配比试验研究

在宁夏西吉县新修旱作水平梯田上，对春小麦进行氮磷配比试验，结果表明：在结合秋耕每公顷施碳铵１８７．５ｋｇ、过磷酸钙３７５ｋｇ、羊圈肥３００００ｋｇ作底肥基础上，春播种肥以每公顷施纯Ｎ６７．５ｋｇ、Ｐ２Ｏ５１０５ｋｇ配比的产量最高，较不施种肥的增产小麦１４５５．５ｋｇ／ｈｍ２，增收９１０．８１元／ｈｍ２，产投比为３．４６；以单施Ｐ２Ｏ５１０５ｋｇ／ｈｍ２作种肥的次之，增产小麦１１４４．４ｋｇ／ｈｍ２，增收８０５．７９元／ｈｍ２，产投比为５．０．

Study on Experiment of Mixing Nitrogen and Phosphorus Chemical Fertilizers for Spring Wheat in New Terraced Field

The experiment of mixing nitrogen and phosphorus chemical fertilizers for spring wheat wasconducted in new non-irrigation terraced field in Xiji County of Ningxia Hui Autonomous Region.The result was as follow:on the basis of fertilizing 185.5 kg of ammonium hydrogencarbonate,375 kg of superphosphate and 30000 kg of sheep barnyard manure per hectare as base fertilizer atautumn plaughing,the wheat yield was the highest when fertilizing seed manure with 67. 5 kg ofpure nitrogen and 105 kg of phosphorus pentoxide per hectare at spring sowing of wheat,the wheat yield and income per hectare were 1455.5 kg and 910.81 yuan more than those without seed manure,its output-input ratio was 3.46;the wheat yield was listed as second when fertilizing seed manure with 105 kg of phosphorus pentoxide per hectare,the increment of wheat yield and income were 1144.4 kg and 805. 79 yuan per hectare separately, its output-input ratio was 5.0.