Investigation On The Nutrient Status Of Vegetable Soil And Research On Effect Of Fertigation

The development of agricultural production can not have water and fertilizer.Per capita arable land area is decreasing,the serious shortage of water resources and resource constraints is getting more and more prominent.The current flood irrigation,excessive application of fertilizer,such as extensive mode of production,not only cause the waste of water resources,but also led to the fertilizer utilization ratio of our country was significantly lower than the developed countries in our country,and brings a series of problems about the soil harden and acidification.The waste of water resources has become the important factors that threaten food security and restricts agricultural sustainable development.Together the irrigation and fertilization(fertilization technology)is an effective measure to solve the above problem,the obvious advantages of efficient utilization of water and fertilizer,and has resource saving,which is known as the NO1 technology in the modern agriculture.In this paper,all agricultural park facilities vegetable changshu city,jiangsu province as the research object,aims to investigate agricultural park facilities vegetable nutrient and its change rule of the situation,and through the facilities,cucumbers,peppers,strawberries cucumber is tested to explore the technical measures of reducing fertilizer.Main conclusions are as follows;(1)Investigation area facilities cucumber cultivation 1 year,2 years,5 years,10 years,15 years of vegetable 0?20 cm soil layer soil of nitrate nitrogen,available phosphorus,available potassium and organic matter appeared different degree of concentration and pH is increased with increasing years of planting a slow downward trend year by year,but increased with increasing years of planting gradually reduce soil bulk density,porosity and field capacity and crumb structure increasing trend along with the increasing length of planting,soil structure gradually improve.(2)In facilities cucumber cucumber in trials,NPK is not applied in any kind of nutrients will reduce the yield of cucumber.Cucumber under the conditions of nitrogen and phosphorus of each 20%reduction processing cucumber production yield was 10%higher than that of the local conventional fertilization,cucumber under the conditions of nitrogen 20%reduction under the process of cucumber production yield was 8.3%higher than that of the local conventional fertilization,and cucumber quality compared with the conventional fertilization increased significantly,the reduction of phosphorus 20%treatment of cucumber yield compared with NPK production effect is not significant.(3)In facilities chili cucumber in experiment,on the basis of the local habits fertilization,set up the total N fertilizer than conventional fertilizer decreased 10%,20%,30%,three treatment,the results of reducing 20%nitrogen treatment is more advantageous to pepper fruit of nitrogen accumulation,and promoted the chili on phosphoras absorption,and compared with other weight loss treatment best pepper production effect,with the local,the yield increased by 13.5%,compared with the conventional application of fertilizer and fertilizer processing quality is better than that of the local habits.(4)In strawberry of cucumber in trials,no fertilizer treatment strawberry nitrogen content was significantly lower than the other,in the process of growth without elements and trace elements in the processing of strawberry nitrogen content is significantly higher than the other;In six processing drip irrigation fertilizer nitrogen reduction processing strawberry yield the highest 15%,than the yield was 12.1%higher than that of the conventional fertilization,followed by the entire drip irrigation(nitrogen 20%reduction)than yield was 4%higher than that of the conventional fertilization,between each processing size of strawberry in addition to the no fertilizer treatment,other difference;Drip irrigation fertilizer nitrogen 15%reduction processing content of strawberry Vc reached a maximum of 80.37 mg/100 g,is significantly higher than other treatments.In the strawberry micronutrient fertilizer processing throughout the reproductive period without yield is low.To sum up,the widespread and full automation use of technology,not only need to rely on technical innovation,policy support and guidance,but also to strengthen the basis research of fertigation,trial promotion and take propaganda and training work.So that feitigation better service modem agriculture in our country.