陕北黄土丘陵区发展蚕桑生产的前景与效益分析

丝织品在国内外市场呈上升趋势,我国生丝出口占国际市场的80%.陕北黄土丘陵区以水平槽带状灌木化在25.以上退耕陡坡地植桑,亩产桑叶650kg;用塑料折簇进行大蚕立体片叶育,亩桑养蚕1张,产茧30kg,亩桑年获利200元以上,投产比为1:4.58.陕北有12个县可发展蚕桑生产,每县栽桑12万亩,亦不与粮食及其他经济作物争地,地方获税利960万元,为国家年创汇2160万元.

BENEFIT ANALYSIS OF SERICULTURE PRODUCTION AT HILLY REGION OF SHAANBEI LOESS PLATEAU

Silk products on the market of China and abroad are rising of tendency.Eight percent of exports of cocoon filament on international market is from China.Planting bush mulberry on sleep slope land more than 25 degrees with deepen levelditches.650kg of mulberry leares per mu couldbe produced at hilly region of Shaanbei loess plateau,rearing of silkworms with intact leaf of mulberry at 4th~5th instar larva on three-dimensional rearing seat of plastic folding mountage,cocoon crop per case of silkworm eggs could be 30 kg and income 200 yuan with the leaves produced per mu of bush mulberry field.The ratio of investment and income is one to four point fifty-eight.There are 12 counties in Shaanbei are suitable for eleveloping of sericulture production.One hundred and twenty thousand mu of mulberry which will not share the land with grain and other economic crops.Local governments could tax sericulture production of nine million and sixty hundred thousand yuan.At the same time,twenty one million and sixty hundred thousand yuan of remittance could be achieved per year for one county.