Root Dipping Make gel coagulation by mixing SAP and clean water according to the proportion of 1:100-150 or form slurry by adding some extra loess. Stir the root of seedling in gel coagulation for 3-5 seconds. Plant the seedling while dipping. With regard to seedling transplant, it is quite preferable to bind seedling up with plastics film.
Hole Spraying When the SAP and fine dry soil are mixed evenly according to the proportion of 1:5-10, spray it in the hole in two layers. Put the first layer at the bottom of the hole and cover soil when the seedling has been put into the hole; put the second layer on top of roots of seedling. Fill in the soil and press it tightly. And then water the hole. It is applicable to seedling cultivation, transplant and so on.
Dig ring-type furrow or strip-type furrow with the width of 10-15cm along the edge of the cast shadow of tree crown, furrow depth subject to exposed part of the root system. After the SAP is evenly mixed with the soil at a distance of 10 cm to the bottom, spray them in the furrow. Water it and then fill the furrow. When SAP and fertilizer are sprayed together, put the fertilizer on top of the SAP and block them by soil. Use quantity of SAP: 20-50 g/one, applicable to grape trees, jujebe, pear trees and peach trees.
Transplanting Seedlings Reference Amount of SAP and Cost
Resultof the experiment conducted in greenhouse indicated that rhizosphere soilwater conten,the number of growth days and the numberofdroughttolerance daysof the seedlings treated with hydrogel increased by9.1% ~39.2%, 0.2~108.8 and 2.2~100.6 respectively in comparisonwith those ofCK.Resultof field afforestation experiment indicated that the rhizosphere soilwater content of the lately planted seed- lings treated with hydrogel increased by 0.7% ~15.4% in comparison with that ofCK, and the rhizosphere soil water content increased with increasing application rate of hydroge;l the survival rate and
preservation rate of theseedlings treatedwith hydrogel increased by 1.1%~72.4%, and the survival rate and preservation rate increased with increasing application rate ofhydroge;l hydrogel significantly promoted the growth of tree heigh,t basaldiame-ter and crown diameter aswell as significantly increased the numberof leaves, and the increasing range of the four indexes all increasedwith increasing application rate ofhydroge.
SAP on the influence on the survival rate of spruce
SAP influence on Acacia confusaseedlings
SAP influence Azadirachta indicaseedlings
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