旱地胡麻高产高效技术的最佳组合

应用系统工程的原理和方法．通过建立模型、模型解析和多目标决策分析，研究了旱地胡麻主要栽培因子播期、播量、施Ｎ量、施Ｐ２Ｏ５量对其产量、效益的影响及最佳组合措施。结果指出：（１）对产量的贡献率，播种量＞氮素＞播种期＞磷素；对效益的贡献率，播种量＞播种期＞氮素＞磷素．（２）以毛收益、产量、可信度、成本、化肥投入量为决策目标，求出旱地胡麻获得籽粒产量１１０ｋｇ／亩、毛收益３５０元／亩的最佳栽培技术方案为：播种期４月２１日－２２日，播种量４．２４－４．５０ｋｇ／亩，施氮量４．５６－４．６６ｋｇ／亩，施磷量４．８５－５．７４ｋｇ／亩。

THE BEST COMBINATION OF CULTIVATION PRACTICS FOR HIGH YIELD AND BENEFIT OF SEEDFLAX ON DRYLAND

Using the principle and method of system engineering, the effect of sowing date and norm, amount of nitrogen and phosphorus fertilizer on dryland seedflaX yield and gross profit was analyses. The results indicated that the contributing rate to seedflax yield was sowing norm>nitrogen>sowing date>phosphorus. while to gross profit was sowing norm >sowing date>nitrogen > phosphorus In order to acheive 110kg grain of seedflax and 350 yuan per mu, the sowing date was 21-22 Agril. sowing norm was 4. 24-4. 50kg/ha and the amount of N and P2O5 applied were 4. 56-4. 66kg and 4. 85-5.74kg per mu respectively.