论文部分内容阅读
本研究采用裂区设计田间试验,获得了油稻稻种植制系统的试验数据,首次提出后效钾量概念。以后效钾量校正对各季作物当季的实际供钾量,进而正确地反映了各季作物产量与供钾量之间的关系;得出在稻田土壤供钾水平极低的情况下,施钾的后效作用很大以及油稻稻种植体系的最大产量钾肥投入量为:油菜16kg K_2O/亩、早稻9.64kg K_2O/亩、晚稻8.79kg K_2O/亩;最佳经济效益钾肥每亩投入量为:油菜11.79kg K_2O、早稻15.28kg K_2O、晚稻6.67kg K_2O。其分配比例分别为1:0.60:0.55和1:1.30:0.57。提出油菜重、早稻重、晚稻轻的施钾原则,以充分发挥施钾的后效和培肥土壤。
In this study, split-plot design field experiment was used to obtain the experimental data of rice-planting system. The concept of after-effect potassium was first proposed. After the correction of the effective amount of potassium in the seasonal crop season, and then correctly reflect the crop yield and the relationship between the amount of potassium supply; obtained in the paddy soil with very low levels of potassium, Shi K after a great effect on the role of oil and rice cultivation system, the maximum output of potash inputs: rape 16kg K_2O / mu, early rice 9.64kg K_2O / mu, late rice 8.79kg K_2O / mu; the best economic benefits potash per acre input As follows: rape 11.79kg K_2O, early rice 15.28kg K_2O, late rice 6.67kg K_2O. The distribution ratio was 1: 0.60: 0.55 and 1: 1.30: 0.57, respectively. The rapeseed weight, early rice weight and late rice light application of potassium principles, in order to give full play to potassium after-effect and fertilize the soil.