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植物选择吸收的特性受遗传因素所制约,但一定程度上又受生长条件和养分供应水平所影响。因此了解作物吸收氮、磷、钾营养元素的比例,探讨某些外界因素对这种吸收比例的影响,将有助于分析农田生态系统中养分的循环和供应状况,以便改进作物养分的供应,提高肥料的效益,提高作物产量。为此,1981年我们收集了全省不同类型地区近30个县的主要农作物——水稻、小麦、花生、番薯、玉米、烟草、甘蔗等当地主要栽培品种的地上部分样本,统一分析氮、磷、钾含量,并进行分类统计,然后就其与施肥有关的一些问题加以分析讨论。 (一)几种作物吸收氮、磷、钾的比例经分析(表1),水稻、花生、小麦、番薯、玉米、烟草和甘蔗的含氮(N)幅度为1.051—2.925％;含磷(P_2O_5)0.424—0.595％;含钾(K_2O)0.713—1.88％。表明不同作物中氮的
The characteristics of plant selection and absorption are controlled by genetic factors, but to a certain extent affected by the growth conditions and nutrient supply level. Therefore, understanding the proportion of crop nutrients N, P and K and exploring the influence of some external factors on the absorption ratio will help to analyze the circulation and supply of nutrients in farmland ecosystems in order to improve crop nutrient supply, Improve fertilizer efficiency and increase crop yields. To this end, in 1981 we collected overground samples from major crops of nearly 30 counties in the province - rice, wheat, peanut, sweet potato, corn, tobacco, sugar cane and other major cultivars, and analyzed nitrogen and phosphorus , Potassium content, and statistical classification, and then on its fertilization-related issues to be analyzed and discussed. (1) Ratio of nitrogen, phosphorus and potassium absorbed by several crops After analysis (Table 1), the nitrogen (N) content of rice, peanut, wheat, sweet potato, corn, tobacco and sugar cane is 1.051-2.925% P_2O_5) 0.424-0.595%; potassium (K_2O) 0.713-1.88%. Indicate nitrogen in different crops