Effects of Applying Hydroxyapatite on Watermelon Quality and Cadmium Accumulation in Cadmium Polluted Soil
LI Han1，WANG Zhi-wei1，3，MIN Zi-yang1，3，DAI Si-hui1，ZOU Tian1，Sun Bo1，SUN Xiao-wu1，2*
1College of Horticulture，Hunan Agricultural University，Changsha 410128，Hunan，China；2Melon Research Institute
of Hunan Province，Shaoyang 422001，Hunan，China；3Watermelon and Melon Research Institute of Hunan Province，
Taking 3 watermelon varieties‘ Huangxiaoyu’，‘Jinxin’and‘ Heimawangzi’ as material，this
experiment studied the effects of different amount Hydroxyapatite（ HAP） on cadmium accumulation，distribution
law and fruit quality of watermelon grown in moderate cadmium polluted soils，so as to verify the safety of
watermelon production. The results showed that applying 0.225 t·hm-2 HAP could significantly reduce the content
of available cadmium in soil and cadmium accumulation in different parts of watermelon. Applying of HAP had less
influence on watermelon fruit quality. The cadmium distribution law in watermelon plant was leaf ＞ root ＞ fruit.
There existed differences in cadmium absorption and accumulations between different watermelon varieties. Proper
watermelon varieties could still produce watermelon in line with the national food safety standard，even in the
moderate cadmium polluted soils.
Received: 26 February 2016
Published: 14 July 2016