Research on characteristics of nutrient uptake and operation of oilseed sunflower in alkaline soil

The aim of the study was to investigate the characteristics the dynamic changes, operation and distribution of NPK nutrients in the organs of oil sunflower plant body in salinity-alkalinity stress conditions.In combination of soil test with field test method,a research was carried out on the characteristics of NPK nutrient uptake and operation of sunflower in alkaline soil in Qianjin farm.The results show that the dynamic changes of NPK contents in the aerial part of oilseed sunflower present a decreasing trend shaped as opposite S curve,which changed with the change of fertilization level and growth stage.The dynamic changes of NPK contents in various organs of oilseed sunflower plant in alkaline soil show different trends in various fertilization levels and growth stages.Mo matter with or without fertilization,the total n NPK absorption of the organs of oilseed sunflower is as follows: N:leafdiscstemrootseed,P: discstemleafseedsroot,K: stemdiscleafrootseed.