Impact of Continuous Aerating Irrigation on Growth, Water Use Efficiency and Nutrient Uptake of Pak Choi Growing in Different Soils
LEI Hongjun
YANG Hongguang
FENG Kai
ZANG Ming
PAN Hongwei
Abstract：A reduction in soil air permeability could make the root zoon anaerobic, affecting crop growth detrimen-tally. Oneamelioration is to irrigate bymixing water with small air bubbles, i.e., aerating irrigation. This paper ex-amined theuse efficiency of water and nutrientsbypakchoi under aerating irrigation. Pak Choi was grown in pots, each filled by one of the following three soils:clay soil taken from Zhengzhou (CS), silty loam taken from Luoy-ang (SIL) and sandy loam taken from Zhumadian (SAL). The crop was either watered with conventional irriga-tion (CK) or drip irrigation with continuous mixing with air bubbles (CAI). Over the growth period, thephysiolog-ical traits and nutrient uptake by the crop under all treatmentswere measured. The results showed that, compared to CK, CAI boosted root growth with the dry rootweight in CS and SIL increasing by 35.33%and 26.22%respec-tively, and root activity increasing by 46.36%and 16.79%respectively. We also found that CAI increased the net photosynthetic rate in CS, SILand SAL by 17.69%, 12.41%and 21.43%respectively;nitrogen uptake in CS and SIL by 23.68%and 27.72%respectively, phosphorus uptake inCS, SIL and SAL by 27.54%, 25.20%and 26.86%respectively, and the potassium uptake by 62.81%, 63.26% and 23.97%, respectively. The yield increase in CS and SIL was 58.42%and 62.03%, and the increase in water use efficiency was 27.86%and 16.47%, respectively. In terms of root growth, net photosynthetic rate, yield, use efficiency of water and nutrients, CAI was more effec-tive for fine texture soils such asclay than for coarse texture soils such as sandy loam.
Keywords：irrigationpakchoigrowth and physiological indexeswater use efficiencynutrient uptake efficiency
Publication Date：2017-11-01
Online Publishing Date：2026-09-12(First online date of this platform, not the publication date of the document)
Pages：6( 13-18 )