Best management practice of potassium for sunflower (Helianthus annuus, L.) in Northwest China

The objectives of the project are to: 1)To determine the critical level of soil K for sunflower production; 2)To study the influence of K source and time of application on sunflower seed yield and quality as well as their interactions with different water regime;3)To establish 4R potassium management practices in sunflower production.

IPNI-2015-CHN-C14

This project was initiated in 2014, and the objectives of this study were to: 1) determine the critical level of soil potassium (K) for sunflower production; 2) assess the right source and timing of K application; and 3) determine the appropriate combination of K rate and water regime. Read more


Year of initiation:2015
Year of completion:2017

Interpretive Summary

This project was initiated in 2014, and the objectives of this study were to: 1) determine the critical level of soil potassium (K) for sunflower production; 2) assess the right source and timing of K application; and 3) determine the appropriate combination of K rate and water regime.

This northwestern China study on 4R K management for sunflower examined K application, the effect of K source and timing, and the interactions between water regimes and KCl rates on sunflower yield and quality. In Gansu, K fertilization increased the seed yield of oil sunflower by an average of 11%, and 14 of 20 sites showed a positive yield response, and increased head diameter, 1000-seed weight, kernel weight, oil content, unsaturated fatty acid, oleic acid, linoleic acid, linolenic acid.

The purpose of this project was to establish best management practices for K in sunflower for Northwest China after three years (2014 to 2016) of study on right source, rate and timing of K fertilization. Potassium application significantly increased total dry matter, seed yield, head diameter, weight of 1000 seeds, kernel rate, and oil content.

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Project Leader

None


Project Cooperators

None


IPNI Staff

S. Li


Location

Asia \ Eastern Asia \ CHN


Topics

4r rate, balanced nutrition, fertilizer economics, nutrient use efficiency

sunflower

Potassium (K)