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在成都金堂县,采用“3414”肥效试验方案探讨了不同氮、磷、钾肥施用量对苦荞麦产量、经济效益及肥效的影响。结果表明,施肥处理苦荞麦产量显著高于不施肥处理,苦荞麦产量分别随着氮、磷、钾肥施用量的增加先增加后降低。纯收入分别随氮、磷、钾肥施用量的增加先增加后降低;产投比随磷肥施肥量的增加而降低,随着氮、钾肥施肥量的增加先增加后降低,即适量减少磷肥的施用量,增加氮肥和钾肥的施用量,可获得较好的经济效益。在低氮、低磷、低钾水平下,两两组合有利于另一肥料肥效的发挥。氮、磷、钾三元二次肥效函数为非典型式,应用产量频率分析法得出每公顷施N 39.8~86.0 kg、P2O574.6~161.2 kg、K2O 29.8~64.4 kg时,产量达2 000~3 500 kg/hm2的概率为95%,值得推广应用。
In Jintang County of Chengdu, the effects of different nitrogen, phosphorus and potassium fertilizers on the yield, economic efficiency and fertilizer efficiency of tartary buckwheat were discussed using “3414” fertilizer efficiency experiment. The results showed that the yield of tartary buckwheat was significantly higher than that of non-fertilizer treatment, and the yield of tartary buckwheat first increased and then decreased with the increase of nitrogen, phosphorus and potassium fertilizers. The net income increased first and then decreased with the increase of nitrogen, phosphorus and potassium fertilizer application rates respectively. The input-output ratio decreased with the increase of fertilization amount of phosphate fertilizer, then increased with the increase of nitrogen and potassium fertilizer dose, Dosage, increase the amount of nitrogen and potassium fertilizer, can get better economic benefits. Under the conditions of low nitrogen, low phosphorus and low potassium, the combination of two is beneficial to the fertilizer efficiency of another fertilizer. The results showed that the N, P and K fertilizers were atypical type. The yield frequency analysis showed that N 39.8 ~ 86.0 kg / ha, P2O574.6 ~ 161.2 kg / K2O and 29.8 ~ 64.4 kg / The probability of 3 500 kg / hm2 is 95%, which is worth popularizing and applying.