Studies On High Quality And High-yielding Cultivation Technology Of Hybridized Mulberry In Jiangsu And Zhejiang Area

The urbanization and industrialization in Jiangsu and Zhejiang area has improved continuously,and the competition within the agriculture industry is becoming increasingly fierce now.Therefore,it has positive significance to research and popularize the new technologies of high quality and high-yield about cultivation of hybridized mulberry and matching technology of sericulture,to improve production efficiency of sericulture and land productivity,enhance the economic development of sericulture production and market competitiveness.This study researched the several key technologies of high quality and high-yielding cultivation of hybridized mulberry in Jiangsu and Zhejiang area,in accordance with the basic idea of "higher planting density,herbaceous cultivation,harvesting shoot,whole year mulberry shoots with leaves",made the following major achievements.It can realize harvesting the shoots with leaves several times in the whole year and high quality and high-yielding of mulberry leaf by increasing the number of planting and shoots,and shorten the harvesting cycles of each growing season in Jiangsu and Zhejiang silkworm rearing area;It is suitable to make the planting density of 5000-6000 plants per 667 m²,row spacing of 65-75 cm,planting spacing of 15-20 cm.Compared to the traditional mulberry leaf picking,the efficiency of leaf harvest can improve 2-2.5 times by high density planting without trunk and harvesting mulberry-shoot three times in the whole year.The suitable period of harvesting mulberry-shoot is May 20 to 25,July 15 to 25,the end of September to the beginning of October;It is suitable to harvest mulberry-shoot when it grows to 1.0-1.3 m each growing season,to balance the leaf yield of three harvest times.It is suitable for six times fertilizing to hybridized mulberry cultivation,and 45-50 kg N,20-25 kg P₂O₅,25-30 kg K₂O per 667 m² of the whole year;The ratios of fertilizer application of three growth period and winter were 30%,25%,35%and 10%,the upper limit was15 kg N every harvest period,then fertilized by base fertilizer and topdressing.We can spray hybridized mulberry field with 200×gramoxone comprehensively before sprouting in early spring or just after harvesting leaves and branches quarterly, directional spray haloxyfopmethyl at the growing period of branches and leaves,and avoid the use of glyphosate,fluroxypyr,bensulfuron methyl,pumas and so on.Jiangsu and Zhejiang area can achieve the goal of high quality and high-yield,the level of quality and yield of mulberry leaf which is similar to Husang 32 in the corresponding measures of cultivation;They can improve the working efficiency and economic benefit of sericulture production,and also have a certain prospect of the kind of parent silkworm rearing.