Effects Of High Ridge And Film Mulching On Soil Characteristics,Vegetative Growth Of Jujube Tree And Fruit Quality Of Zizyphus Jujuba Mill Cv.'Lingwuchangzao'

Zizyphus jujuba Mill cv.'Lingwuchangzao' is a kind of fresh jujube with local characteristics in Ningxia,with remarkable benefits.In order to explore suitable light and simplified ecological cultivation management techniques and further improve fruit quality,yield and benefit,in the Lingwu Changzao plantation of the experimental farm of Ningxia University,the 8-year-old Lingwuchangzao grafted seedlings were used as the object and flat-film mulching(PDM),high ridge(GL)and high ridge mulching(GLM)three cultivation modes,with flat cultivation as a control,analysis and comparison of the root zone soil environment,vegetative growth of jujube,yield and fruit quality under the four cultivation modes,Research indicates:1.Under different cultivation modes,the soil temperature in the root zone of 'Lingwuchangzao' is as follows:flat cultivation with film mulching>high ridge cultivation>high ridge cultivation>control(flat cultivation).The average temperature of flat cultivation with film mulching,high ridge cultivation with film mulching and high ridge cultivation is 15.05%,6.88%and 11.35%higher than that of the control,respectively;in the range of 20-40 In cm soil layer,the average oxygen content of high ridge cultivation and high ridge mulching cultivation increased by 4.09%and 2.41%,40-60%respectively compared with the control Within cm soil depth,the mean value of soil oxygen content in each period was as follows:high ridge cultivation>high ridge mulching cultivation>control(flat cultivation)>flat cultivation and film mulching cultivation;the soil humidity of flat cultivation and high ridge mulching was significantly higher than that of control and high ridge cultivation,and the average soil humidity of flat cultivation and high ridge mulching cultivation increased by 64.73%and 68.77%respectively.The results showed that mulching increased soil temperature and humidity,and ridge cultivation increased soil oxygen content.2.Compared with the control,the net growth of hanging diameter,leaf area,fresh weight and dry weight of leaves increased by 31.01%and 19.78%respectively,and that of 'Lingwuchangzao' under the high ridge cultivation mode was lower than that of other treatments.3.Compared with the control,the three treatments could increase the yield per plant,the content of soluble solids and soluble sugar.The yield per plant,fruit weight per fruit,volume,soluble solid content,soluble sugar content and Vc content of 'Lingwuchangzao' under the high ridge cultivation mode increased by 28.29%,12.31%,2.84%,8.30%,25.40%and 11.43%respectively,which were higher than those of other treatments.The comprehensive evaluation of the yield and fruit quality of 'Lingwuchangzao' under the four cultivation modes showed that the effect of high ridge cultivation was the best.4.There was a positive correlation between soil moisture and the net increase of leaf area and dry and fresh weight,and a negative correlation between soil moisture and the content of soluble solids and Vc.There was significant or extremely significant positive correlation between soil oxygen content and fruit soluble solids,soluble sugar and Vc content.To sum up,plastic film mulching,high ridge and high ridge plastic film mulching cultivation can improve the yield,in which high ridge cultivation can increase the soil oxygen content and soil temperature in the root area of jujube,and the effect of increasing yield and increasing efficiency is the most significant,which is more suitable for application in the production of‘Lingwuchangzao'.