Abstract: In order to study the application effect of zinc fertilizer on small-fruited watermelon,
small-fruited watermelon cultivar of 'Jincai' planted in greenhouse was used as experimental material,
and zinc sulphate fertilizer with different dosage was designed (0.75, 1.00, 1.25 kg per 667 m2
, 4 times
in the whole growth period). The growth indexes, physiological indexes and benefits of small-fruit
watermelon were compared and analyzed. The results showed that the optimal application amounts of
zinc sulphate fertilizer was 0.75 kg per 667 m2
everytime for small-fruit watermelon in greenhouse
under the conditions of this experiment. The stem of small-fruit watermelon was thick, the fruit was
good for commodity and the yield was high. Compared with the control without zinc sulphate fertilizer,
the plant height, main stem diameter, contents of edge sugar and heart sugar increased by 6.81%,
49.84%, 13.68% and 11.11%, respectively. The yield and net income increased by 10.44% and 11.72% per 667 m2
, respectively. The input of topdressing zinc fertilizer was low, and the income increased
obviously. However, it was important to pay attention to the amounts of zinc fertilizer application,
because excessive fertilization would lead to the decline of yield and quality. |