Potassium fertilization combined with crop straw incorporation alters soil potassium fractions and availability in northwest China: An incubation study.

ABSTRACT: Potassium (K) input is essential for the improvement of soil fertility in agricultural systems. However, organic amendment may differ from mineral K fertilization with respect to modifying the soil K transformation among different fractions, affecting soil K availability. We conducted a 60-day lab incubation experiment to evaluate the response of soil K dynamics and availability in various fractions with a view to simulating crop residue return and chemical K fertilization in an Anthrosol of northwest China. The tested soil was divided into two main groups, no K fertilization (K0) and K fertilization (K1), each of which was subjected to four straw addition regimes: no straw addition (Control), wheat straw addition (WS), maize straw addition (MS), and both wheat straw and maize straw additi

SUBMITTER: Li X 

PROVIDER: S-EPMC7380607 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature