Investigation And Analysis On Effects Of Several Models Of ‘Lingwuchangzao' In Greenhouse

In order to explore the efficient cultivation mode of Lingwu Changzao under the condition of facility,this experiment used Lingwu Changzao as the test material to investigate eight cultivation modes of Lingwu Changzao,including flat bed mulching,small size root-limiting container,trunk extension shaprng and pruning,flat bed mulching,large size root-limiting container and trunk extension shaping and pruning.The differences of nutritional growth,fruit quality and economic benefit of Lingwu Changzao under different cultivation modes were analyzed and compared.The results show that:1.Under the root-limited cultivation mode,jujube hanging length and jujube hanging diameter were 27.84%and 32.11%lower than those under the conventional cultivation mode,and the area of single leaf,fresh weight of louvers and dry weight of louvers were 16.25%,15.51%and 19.18%lower than those under the conventional cultivation mode.The fruit setting rate per plant was 37.7%higher than that under the conventional cultivation mode.Therefore,the root-limited cultivation model of Lingwu long jujube decreased the growth of leaves and chlorophyll content of leaves,but increased the fruit setting rate of Lingwu Changzao.2.Root-limited cultivation improved the fruit quality of Lingwu Changzao and increased the yield per plant(higher than the conventional cultivation mode);increased the soluble sugar content,sugar-acid ratio,VC content and soluble solid content,but decreased the organic acid content,among which the cultivation mode of ridge mulching+large-scale root-limited container+trunk extension had the best effect on improving fruit quality and yield.3.Under the root-limited cultivation mode,the contents of total nitrogen,total phosphorus and total potassium in leaves of Lingwu Changzao were increased by 17.9%,43.55%and 21.97%respectively compared with the conventional cultivation mode;the contents of organic matter,available potassium,total phosphorus,available phosphorus,alkali-hydrolyzed nitrogen,total salt and total nitrogen were significantly increased,the soil pH was reduced,the content of soil oxygen was increased compared with the conventional cultivation mode,and the soil nutrient and aeration status were improved.4.By observing the phenological period of Lingwu Changzao jujube and investigating and analyzing its production cost and economic benefit,the results showed that the first batch of fruits could be picked at the beginning of May under the four cultivation modes of root-limited cultivation and trunk extension,and the growth and development period shortened nearly 20 days compared with the conventional cultivation mode.Because of the early market time,the average unit price was 200 yuan/kg,the output value of each plant could reach 2020 yuan.Medium-high ridge mulching+large-scale root-limiting container+trunk extension cultivation mode has the most significant effect on economic benefits.In a word,through the integration and optimization of key cultivation techniques such as plastic film mulching,ridging and rooting restriction,and trunk extension,the goal of increasing yield and cfficiency can be achieved,which is suitable for popularization and application in Lingwu Changzao production.