The cultivation experiment with zero tillage and rice straw mulch technique was conducted in cultivation of Favorita,a virus-free potato variety with early maturity,in the paddy field to probe the new cultivation model and increase its yield per unit area and economic benefit for raising farmers'income.The results showed that the yield under the zero tillage cultivation technique increases by 224.9 kg/667m2 compared with that under the traditional ridge cultivation model and its increase range is up to 16.2% and the fractional harvest can help big potatoes go on the market early,which can greatly raise its net income(2681.50 Yuan/667m2).

运用4因素5水平二次正交回归旋转组合设计,对杂交杂交玉米"安单4号"产量与密度及N、P、K施用量间的关系进行研究,建立产量与各因素的数学模型:Y=808.41-5.97X1-1.07X2+1.07X3+16.91X4-35.34X12-12.69X22-26.24X32-17.42X42+10.56X1X2+9.24X1X3+11.12X1X4+1.18X2X3-16.95X2X4-9.52X3X4.并得出在安顺及相似生态条件下,"安单4号"产量≥600 kg/667m2优化栽培措施为:密度3 566～3 634 株/667 m2,氮肥24.17-25.48 kg/667 m2,磷肥48.78～51.22 kg/667 m2,钾肥30.61～31.85 kg/667 m2.