1试验概况1.1试验地概况本试验设在南阳市种子技术服务站茶庵张堂村试验田内,该试验地交通方便,地势平坦,地力均匀,排灌条件好,周边无障碍物并远离周边村庄,经南阳市土肥站化验,该试验地为老黑土,全氮1.28%、速效磷17.5mg/kg、速效钾112mg/kg、有机质1.34%,属中上等肥力条件,前茬作物为玉米,产量在8 250kg/hm~2左右。 1 Test Overview 1.1 Test Site Overview This experiment is located in Nanyang City Seed Technology Service Station Cham Zhang Zhangcun test field, the test ground to facilitate traffic, flat, uniform fertility, irrigation and drainage conditions are good, no obstacles around and away from the surrounding villages, After testing in Nanyang City, soil fertility station, the experiment was old black soil, total nitrogen 1.28%, available phosphorus 17.5mg / kg, available potassium 112mg / kg, organic matter 1.34% In 8 250kg / hm ~ 2 or so.