Sunlight sheds effect on earlier maturity of Myrica rubra

Key words: 
• fruit cultures /
• Myrica rubra /
• sunlight shed /
• development of blossom and fruit /
• earlier matuity

Abstract: Myrica rubra is used as a test material to study the temperature and monisture change of sunlight shed and its effects on the blossom , fruit development and earlier maturity of cv .Dingao .The result showed that the average temperature inside the shed at noon during J anuary and May was 20.8 -33.3 ℃, which was 11.4 ℃ higher than that outside .During cold current period , the temperature inside the shed was 4.8 -7.0 ℃higher than that outside .When the temperature outside the shed was reduced to -3.0 ℃, the inside temperature was 1.0 ℃. The soil temperature under the depth of 20 cm inside the shed was 12.0 -14.0 ℃, which was 5 -6.0 ℃higher than outside temperature ;the air moisture inside the shed was over 85 %, which was 4 %-5 %higher than that outside .Optimum temperature and moisture inside the shed caused the earlier bud and blossom by 15 -19 days . Fruits developed 2 weeks earlier than usual .The film of shed should be covered at the end of December .Earlier film covering had no effect on earlier maturity .The unit yield inside the shed was 8.9 thm-2 , 19.62 %higher than that outside .The economic benefit was 4.2 -5.7 times higher than usual .The establishment of M .rubra shed is discussed [ Ch , 2 fig .3 tab .10 ref .]