Effects Of Different Fertilization Systems On Mature Grapes In Deep Pit Irrigation

In this paper,in the early stage of the deep pit(poa pratensis)technology on the basis of a large number of research results,to explore through the deep pit(poa pratensis)under the condition of different fertilization systems on prostagland grapes on the effect of dynamic change law of soil moisture content,being grown up whole growth period of grape intensity of water consumption and water consumption rule and the influence of various nutrient content in soil in the whole stages of influence and function relation between the fertilization rate and yield analysis summarized,that is suitable for deep pit(poa pratensis)irrigation technology of cucumber in theory.Relevant research results are as follows:(1)derived from the test data shows that the deep pit(poa pratensis)can be used for evaporation intensity greatly the extreme arid region,can effectively avoid the topsoil moisture ineffective evaporation,to save water,improve the utilization efficiency of grapes,fertilization,increasing efficiency,etc.(2)the maximum amount of water required for each phenological phase is the fruit expansion period and the ripening stage of berries,and the water supply should be centralized from June to July.Under the condition of deep pit seepage irrigation,the water mainly concentrates in the40cm-80 cm soil layer,which happens to be the thickest area of the grape root system,avoiding surface evaporation and deep leakage.(3)the water consumption and water consumption intensity of the aged grapes increased with the increase of the amount of fertilizer,and the water consumption and water consumption intensity of the grapes were correspondingly reduced when the fertilization amount and the irrigation water reached the optimal threshold.Due to the small amount of fertilizer applied in the previous treatment,the transpiration intensity of the plants was less than that of other treatments,and the amount of fertilizer was 247.5kg/hm squared.There is little difference in soil surface evaporation in each fertilization system.The reason is that under the condition of deep pit seepageirrigation,the surface layer of soil surface is basically kept dry.(4)according to the study on the change of soil nutrient content,it is concluded that urea should be the main factor in the early stage,and phosphorus and potassium fertilizer should be small.After the flowering period,the fertilization of phosphorus and potash should be gradually increased until the ripe end of the berries.This can maximize the utilization efficiency of water fertilizer.(5)obtained from fertilizer rate as a function of production: the irrigation water is 1183.5 m after/mu,applied amount of n fertilizer should be set as 242.5 kg/hm squared,phosphorus content is 121.25 kg/hm squared,k quantity is 242.5 kg/hm squared,water use efficiency to achieve optimal,yield and quality of the grapes will reach a higher level.