| The main of paper is passed adopt field,PC,have shined upon the seedling experiment,having waited for experiment method combining with and pilot production,have carried out comparatively systematic research on the principle and technology improving Picea mongolica survival rate of afforestation and preserve,have reached fundamental conclusion of the following:1.Though production find that,Picea mongolica on arctic-alpine overflow the pasture area forestation,adopt machinery ditching soil preparation way,may carry a survival rate of afforestation 7%,improves forestation preserve 25%,sapling growth amounts improve 30% the above. In sands forestation,adopt WPFM,the container seedling plant wait for measure,make a survival rate of afforestation improve 20% ~ 30%.2.Test result indicates by the fact that WPFM,that WPFM is more average than contrasting improving soil moisture content 2.0% ~ 2.5%,improves the ground temperature averagely 1 ~ 2℃.2 lives,3 lives and 4 lives improve 25%,21.4% and 23.8% respectively than the nursery stock survival rate of afforestation contrasting,improve 26%,44% and 22% respectively than high nursery stock growth amounts contrasting.3.By the fact that PC test result indicating moisture content,the physiology of Picea mongolica young seedling limit being worth,value is 3.11%,and the loam of Picea mongolica young seedling limit being worth,value is 3.96%.4.The test result fighting a drought SUS is indicated,the growth of Picea mongolica nursery stock moisture content with nursery stock reduces but is weakened,nursery stock dehydration leads to nursery stock survival percentage coming down in airing process.And Pinus sylvestris var. mongolica compares,young seedling of two seeds of trees is in arid coerce time,the basic preserving and losing condition is identical to moisture content,young seedling stage Picea mongolica draws to the moisture content preservation to lose an ability slightly greater than Pinus sylvestris var. mongolica young seedling.
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