红壤旱地春玉米高产栽培技术研究

红壤旱地种植春玉米宜选用中早熟紧凑型玉米品种，本试验条件下，以“湘玉７号”的产量最高，依据地力和施肥水平的高低，每公顷种植７８７５０～９３７５０株均能获得较高产量。每公顷施纯Ｎ３００ｋｇ、Ｐ２Ｏ５１８０ｋｇ、Ｋ２Ｏ２４０ｋｇ，基、苗、穗Ｎ肥的比例２∶３∶５，籽粒产量可超７５００ｋｇ／ｈｍ２。

Study on High Yield Culture Technique of Spring Maize in Red Upland Soil

Compact maize variety with middle-early maturity is adaptable to be chosen as spring maize planted in red upland soil. Yield of Xiangyu 7 was the highest under the conditions of this trial. Planting 78 750～93 750 maize plants per ha depending on the soil productivity and fertilization can lead to higher yield. By applying 300 kg N, 180 kg P 2O 5 and 240 kg K 2O per ha with 20%, 30% and 50% N applied before sowing, during seedling period and earing stage, the grain yield can reach 7 500 kg/hm 2 above.