新型氮肥对水稻产量养分积累及吸收利用的影响.

【Objective】 The test aimed to research the influences different new-type nitrogenous fertilizers have on Guizhou’s rice output, biomass, nutrient uptake and utilization and their roles in the saving fertilizer but increasing yield in the process of growing rice, from which to get the most suitable new-type nitrogenous fertilizers for rice growing of the mountainous areas of Guizhou. 【Method】 A field contrast experiment taking Leyou 58(a rice variety) as experimental material with different fertilization plans of common urea and four new nitrogen fertilizers was conducted. 【Result】 Compared with common urea treatment, the new-type nitrogenous fertilizers treatment could improve the component of rice yield to some extent, and could increase the rice output and parts of aboveground biomass, and the rice could have the highest increase rate and grain biomass by humic acid urea treatment, the number was 16. 28 % and 84. 44 g/hole respectively;The lost control urea, humic acid urea, the topdressing of the lost control urea or the common urea with equal zinc fertilizer could increase part of accumulation nitrogen, phosphorus, and potassium, and humic acid urea treatment could make the rice nutrition accumulate more in the rice grain;What’s more, through which the rice could have the best compositive expression of nitrogenous fertilizers utilization efficiency, partial fertilizer productivity, nutrient harvest index, nutrient absorption efficiency, nitrogenous fertilizers agronomic efficiency, and all of these improved the rice’s absorption and utilization of nutrients. 【Conclusion】 The application of urea humic acid in rice area of Guizhou had the best effect. [ABSTRACT FROM AUTHOR]