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为解决苜蓿规模化技术研发滞后于产业发展等关键性问题,采用测土配方施肥试验,结合理论优化模型和计算机模拟寻优技术,筛选出高产苜蓿的最佳土肥配比技术。结果表明:田间测产与4种模型筛选出,经济效益最佳施肥组合为:当P肥31.70kg/hm~2(Ca(H~2PO_4)_2·2H~2O为159 kg/hm~2)、K肥86.05kg/hm~2(K_2SO_4为172 kg/hm~2)、N肥73.08kg/hm~2(CO(NH~2)_2为159 kg/hm~2)时,产量为12348.66 kg/hm~2,肥料投资较低(1171.8元/hm~2),与最高肥料投资相比低386.3元/hm~2,产投比为21.08。
In order to solve the key problem that alfalfa scale-up technology lags behind industrial development and so on, we adopted the soil testing and formula fertilization experiment, combined with theoretical optimization model and computer simulation optimization technique, and screened the best soil-fertilizer ratio technology of high-yield alfalfa. The results showed that the field test and the four models were screened out. The best combination of economic benefits was as follows: when the P fertilizer was 31.70kg / hm ~ 2 (Ca (H 2 PO 4) 2 2H 2 O 159 kg / hm 2) , K fertilizer 86.05kg / hm ~ 2 (K_2SO_4 was 172kg / hm ~ 2), N fertilizer 73.08kg / hm ~ 2 (CO (NH_2) _2 was 159kg / hm ~ 2) and the yield was 12348.66 kg / hm ~ 2, lower fertilizer investment (1171.8 yuan / hm ~ 2), 386.3 yuan / hm ~ 2 lower than the highest fertilizer investment and 21.08%