Research On Reasonable Fertilization And Fertigation Technology For Lingwu Jujube Cultivation

For now Lingwu jujube extensive management in the production process, the presence of water and fertilizer management problems, through field experiments and laboratory analysis, control water demand Lingwu jujube need fertilizer law, the development of rational scientific fertilization and irrigation system in the production process to reduce the waste of resources, increase water and fertilizer use efficiency, reduce production costs and improve long jujube production, improve the quality of long date, it has great significance for the development of longer Lingwuchangzao industry. Through field trials of Long jujube water demand in the growth process needs fertilizer law, the reasonable amount of water and fertilizer application, put forward long jujube quality and efficient cultivation and management technology system, the main conclusions are as follows:(1) Low levels of nitrogen, phosphorus and potassium are administered to promote the growth of long jujube varying degrees, with the nitrogen, phosphorus increased significantly increase the amount of potassium fertilizer shoot growth and chlorophyll content, nitrogen, phosphorus, potassium administration while promoting the fruit development, increase production, but the increase in excess of nitrogen, phosphorus and potassium will lead jujube growth inhibition, resulting in decreased yield and quality. Through the nitrogen, phosphorus and potassium fertilizer and long jujube Yield simulation equations, obtained the highest five-year growth of production of nitrogen, phosphorus and potassium fertilizer dates were 554.01 kg/hm2,212.93 kg/hm2,533 kg/ hm2, most good economic fertilizer was 485.93 kg/hm2,197.16 kg/hm2,468.3 kg/hm2.(2)Drip irrigation effectively promote the growth of new shoots thickening, increase chlorophyll content and leaf NDVI value, lower shoot water potential, increased fruit soluble sugar, Vc content, improve fruit quality, increase yield. Irrigation 2250 m3/hm2 treatment not only reduces the water input, water conservation, improved water use efficiency, but also improve the yield, the city fruit quality, reasonable irrigation.(3)Compared with traditional fertilizer, irrigation fertilizer to effectively improve the long jujube shoot growth, deciduous number; promote fruit length, diameter development, improve the long jujube production. Not only reduce fertilizer inputs in the production process, while improving the production, increase farmers’ income. Stars based on yield and NPK fertilizer drip irrigation fertilizer relationship equation: Y=-309.54+67.51X-0.7282X2, R2= 0.8811; obtaining the highest yield amount of NPK fertilizer drip irrigation 695.25 kg/hm2, theoretical calculations and actual field Experimental values are close, NPK fertilizer drip optimum application rate was 695 kg/hm2. Fertilizer derived equations based on biogas production and fertilizer drip relationship Y=-0.1799X2+3.5523X+0.5403, R2=0.9172.(4)Ca administration significantly increased the long jujube soluble sugars and reducing sugar content, but also to improve the content of total acid and Vc content is decreased, Fe fertilizer application can effectively inhibit the accumulation of long jujube fruit acidic substance, increase Vc content, soluble sugar content but low; Mn fertilizer also reduces the total fruit acid content increase Vc content, but also reduces the content of soluble sugar; Zn is effective in improving fruit soluble solids content; B effectively reduce fat the total acid content long jujube, have different effects on different fertilizer on growth and long jujube fruit quality, all kinds of trace element fertilizers in order to ensure long relationship jujube growth and development needs of nutrients, balanced yield and quality, promote production income.(5)Four kinds of organic fertilizers on growth and quality of long jujube varying degrees of influence, in addition to Ng Fung humic acid organic fertilizer, the three organic fertilizer on the growth and increase production of long jujube has promoted, including high activity Attapulgite highest organic fertilizer production; at the same time, the ability to root organic and inorganic fertilizer significantly improve long date in reducing sugar content, attapulgite highly active organic fertilizer will help improve the fruit soluble sugar content and Vc content, Ng Fung humic organic Fertilizer on yield promoting growth in the long jujube is not obvious, but effective long jujube fruit inhibited the accumulation of acidic substances, reducing the long jujube total acid content. Comprehensive Organic Fertilizer on long jujube growth, yield and quality of the various factors affecting the recommended administration of attapulgite high activity in the production process of organic fertilizer.