玉米新品种郧单20需肥规律研究

目的]探讨玉米新品种郧单20的需肥规律,制定郧单20的高产栽培体系。方法]以高产玉米新品种郧单20为材料,采用底肥和追肥双因素完全随机区组设计,研究了底肥和追肥不同处理对郧单20农艺性状和产量的影响。结果]该品种不追肥的产量较追肥低;追肥量在450~600 kg/hm~2时,虽然产量较高,但倒伏也较严重,且与追肥量300 kg/hm~2的产量差异不显著;该品种在底肥750 kg/hm~2、追肥300 kg/hm~2的施肥水平下,产量为11 425.50 kg/hm~2,其抗病性、抗逆性、植株农艺性状较优。结论]郧单20较为适宜的施肥量为底肥750 kg/hm~2、追肥300 kg/hm~2。

Fertilizer Requirement Pattern of New Maize Varieties Yundan 20

Objective] The aim was to explore the fertilizer requirement pattern of new maize varieties Yundan 20 and formulate high yield culture system of Yundan 20.Method] We used the high-yielding maize varieties Yundan 20 as experiment object, designed a double factors completely randomized block test, studied the effect of different base fertilizer and different top application treatment on the agronomic traits and yield of Yundan 20.Result] The yield of no fertilizer treatment was the lowest;the yield of the treatment with 450-600 kg/hm2 top application was higher, while, the lodging-resistance capability was weak;there was no significant difference between the treatment with 450-600 kg/hm2 top application and 300 kg/hm2 top application;the treatment with 750 kg/hm2 base fertilizer and 300 kg/hm2 top application was the most appropriate fertilizer rate, and its yield was 11 425.50 kg/hm2, furthermore, its disease resistance, lodging resistance and plant agronomic traits were better than others.Conclusion] The suitable fertilizer rate is 750 kg/hm2 base fertilizer and 300 kg/hm2 top application.