Journal of Plant Nutrition ( IF 2.1 ) Pub Date : 2021-01-12 Badryeh Karimi, Asad Rokhzadi, Abdol Rahman Rahimi
Abstract
Introducing optimum ranges of agronomic resources such as fertilizers and plant materials is of great importance in crop production systems. In this study response surface methodology (RSM) was used for empirical modeling and optimizing the effects of plant density, nitrogen (N) and micronutrients (M) fertilizers on dry matter yield, essential oil production and nitrogen use efficiency (NUE) of sage (Salvia officinalis L.). The experimental factors of plant density (5–10 plants m−2), N (0–200 kg ha−1) and M (0–4 g L−1) fertilizers were laid out in a Box-Behnken design. Increasing plant density under high rates of M fertilizer resulted in increased dry matter, essential oil and NUE while plant density without M fertilizer application, had no effect. The simultaneous application of N and M fertilizers had a synergistic effect on dry matter yield and essential oil production. In general NUE decreased with increasing the rate of N fertilizer. Through optimization operation the density range of 8.7–10 plants m−2, the N fertilizer rate less than 95 kg ha−1 and the M fertilizer range of 2.4–4 g L−1 were suggested as the optimum conditions to obtain desirable values of responses.
中文翻译:
施肥和植物密度对丹参氮素利用效率,生物量和精油的RSM模拟
摘要
在农作物生产系统中,引入最佳范围的农艺资源(如肥料和植物材料)非常重要。在这项研究中,将响应面方法(RSM)用于经验建模和优化植物密度,氮(N)和微量营养素(M)肥料对鼠尾草干物质产量,精油产量和氮利用效率(NUE)的影响。丹参(Salvia officinalis L.)。植物密度(5-10株植物m -2),N(0-200 kg ha -1)和M(0-4 g L -1)的实验因子)肥料按照Box-Behnken设计进行布置。在高肥水平下增加植物密度导致干物质,精油和NUE的增加,而在不施肥的情况下植物密度没有影响。氮肥和氮肥的同时施用对干物质产量和精油产量具有协同作用。一般来说,氮素含量随着氮肥施用量的增加而降低。通过优化操作,建议将密度范围为8.7–10株植物m -2,氮肥施用量小于95 kg ha -1和M肥料范围为2.4–4 g L -1作为获得理想值的最佳条件。回应。