Spraying rare earth foliar sprayed rare earth can increase the sugar content by 0.6 degrees and increase the yield. The method of use is: spraying 0 during the softening period of the fruit . 05 % rare earth nitrate solution. The spraying site is dominated by young leaves and leaf backs. Spraying time is best chosen on sunny afternoons or cloudy days to avoid exposure after spraying or raining. If it rains within 24 hours after spraying , it should be sprayed again.
When spraying agent sufficiently softened sugar by the fruit, fruit part slightly turn purple, before picking sold week ear uniformly sprayed on 150 ─ 300 times colored grape sugar glucose by the coloring agent, coloring promote, enhance sweetness.
Spraying hormones mainly regulate phosphine and auxin, which can increase the sugar content by 1 degree and 0.6 degree , respectively . The method of use is as follows: when the fruit begins to soften, spray the phosphine solution or the auxin solution. The spraying site is also dominated by young leaves and leaf backs. Spray should be even and moist.
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