Sprayed three times of different concentration NaHSO3 upon grape leaves during berried expansion.It was shown by the authors that NaHSO3 concentration is 100ppm,and that NaHSO3 can obvionsly increase yield,improve quality and quicken precocity.It is related to increasing chlorophyll content,raising photosynthetic rate and the ear of berry weight.
Key words
NaHSO3; Grape; Photosynthesis;Yield; Quality
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