Author(s)

Tiyuan Xia, Song Jin, Zebin Chen, Zuoxin Tang, Yuan Su

Corresponding Author

Tiyuan Xia

ABSTRACT

In this paper, soil microelements are detected from different dragon fruit planting plots in the dam and mountain areas of dry-hot valley of the Yuanjiang River. Then, the nutrient requirements of dragon fruit plants are analyzed combined with the annual biomasses of branches and fruits. The results show that during the process of cultivating dragon fruits, the amounts of annual nutrient input are pure boron 30kg/ha, pure magnesium 150kg/ha, zinc sulfate 45kg/ha, manganese sulphate 30kg/ha and ferrous sulphate 30kg/ha; the contents of available boron are low in dragon fruit planting plots in dry-hot valley of the Yuanjiang River; the exchangeable calcium contents are between grade 1 and 3; the differences in exchangeable calcium contents are great, with highest level reaching grade 2; the contents of exchangeable magnesium fluctuate greatly between grade 1 and grade 5; the contents of water soluble chloride are between grade 2 and grade 4; the contents of hydrolytic available nitrogen are between grade 2 and grade 5; the contents of available copper are between grade 1 and grade 4; the contents of available zinc are above grade 2. In general, the contents of available boron, exchangeable magnesium, water-soluble chloride, available copper, available zinc, available iron and available manganese are relatively low. In the process of dragon fruit cultivation, nutrients with different microelements should be applied in time to ensure the nutrient requirements of dragon fruit plants.

KEYWORDS

Dry-hot valley of the Yuanjiang River, dragon fruit, production system, microelements