Epigenetic effect of SPNE on yield and biochemical character of shatang orange

SPNE (Special Plant Nutritional Element) was sprayed to plants of shatang orange in two years. The plants were divided into two types that were sprayed by SPNE and water in the first year, then the plants were divided into four types in the second year: The plants were sprayed by SPNE in the first half year, were sprayed by SPNE again in the second half year; The plant were sprayed by water in the first half year, were sprayed by SPNE in the second half year; The plant were sprayed by SPNE in the first half year, were sprayed by water in the second half year; The plant were sprayed by water in the first half year, were sprayed by water again in the second half year. The results showed that the yield and quality of shatang orange could be increased by SPNE in the first year. When the shatang orange plants were treated by SPNE in the second year, yield and content of soluble solids, protein, chlorophyll and activity of peroxidase (POD) were better than the contrast. The best group was that treated by SPNE for two years.