Potassium Management for Improving Processing Tomato Yield and Quality in Xinjiang

IPNI-2012-CHN-XJ4

This project was supported by BPC since 2012 to study potassium fertilizer application on yield and quality of processing tomato in Xinjiang Province. Read more


Year of initiation:2012
Year of completion:2016
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Interpretive Summary

A field trial and demonstration was conducted each year in Xinjiang, China, during 2014 to 2016. The objectives of this project were to: 1) evaluate the effect of different ratios of potassium chloride (KCl) application in fall on yield and quality of processing tomato and chloride (Cl-) residue in soil profile; 2) determine input/output balance of Cl- in plant soil systems; and 3) determine the right source and time of potassium (K) application.

The objectives of this study are to determine the appropriate ratio of KCl application for processing tomato through the evaluation of fruit yield/quality, economic benefit, and Cl- accumulation in the soil profile. Equally splitting the total K application (as KCl), between flowering and fruiting stages produced more total aboveground dry matter, single fruit weight, and fruit yield as well as less total acid content than either KCl+K2SO4 or K2SO4 alone.

The objectives of this study are to determine the appropriate ratio of K sources applied in fall by evaluating the yield/quality of drip-irrigated processing tomato, and Cl- residue in the soil profile. The split application of KCl alone or combined with K2SO4 produced more fruit yield than when all of the KCl was applied basally in the fall.

Two experiments on K application rate and proper time of fertilization and two trials on K nutrient sources were conducted in Changji City of Xinjiang Province using two tomato varieties (HYH-01 and Tunhe-No. 8). Plant uptake of K in later stages of crop growth (i. e. , after 48 days of transplanting) was mainly transported to the fruit, so sufficient K supply in later stages is important for K nutrition of processing tomato. Application of K at 120 kg K2O/ha for variety Tunhe-No.

Potassium Management for Improving Processing Tomato Yield and Quality in Xinjiang, 2012 Experiments were conducted in Xinjiang in 2012 to investigate the principles of biomass and K accumulation of processing tomato, determine the appropriate rate and time of K application, and study the effect of K source (KCl, K2SO4, and KNO3) on fruit quality. Dry matter accumulation increased rapidly 53 days after transplanting (DAT) when tomato fruits were growing rapidly.

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Updates & Reports

2013

Project Description


Publications

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Improving Yield and Profitability of Processing Tomatoes in Northwest China with Potassium Tomatoes require a relatively large amount of potassium (K) for adequate growth. Recently, scientists have detected declining K concentrations for soils in the Xinjiang region, and this is thought to be related to the amount of K removed from the field during the continual harvest of processing tomatoes as well as other crops. Falling soil K fertility is leading to a reduction in tomato yield and quality.
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