Blending sludge alkaline hydrolysate and urea affects grape yield and quality by regulating soil bacterial communities.

ABSTRACT:

Introduction

Fertilization is vital for improving grape (Vitis vinifera L.) yield and quality. Unlike traditional nitrogen fertilizers, the mechanisms by which sludge alkaline hydrolysate (SAH), a novel fertilizer, influences grape quality and yield are still poorly understood.

Methods

In this study, six treatments were established: 20% SAH + 80% urea (M1), 40% SAH + 60% urea (M2), 60% SAH + 40% urea (M3), 80% SAH + 20% urea (M4), pure SAH (M5), and pure urea (M6). The effects of applying SAH and urea mixtures to grapes were evaluated, with focus on performance parameters, soil nutrients, and microbial communities.

Results and discussion

The results show that 60-80% SAH application significantly enhanced grape stem thickness, chlorophyll content, photosynthetic

SUBMITTER: Xue D 

PROVIDER: S-EPMC12518296 | biostudies-literature | 2025

REPOSITORIES: biostudies-literature