Effects Of Water And Fertilizer Integration On Growth, Quality And Soil Properties Of Blueberry

Integration of water and fertilizer is one of the key techniques to improve the quality and yield of blueberry.Meanwhile,the soil acidification of perennial blueberry is also the main factor restricting the large area promotion of blueberry.This research adopts the field experiment and indoor analysis,study are more in the integration of water and fertilizer field experiment in Weihai city of Shandong province for two years in 2015,a large number of elements for water fertilizer for the different ratio of soluble fertilizer and fertilizer,mainly on large elements water soluble fertilizers on soil properties in different proportions of blueberry,blueberry growth,influence the quality and yield of fertilizer application,soil acidification effect for blueberry.The results of this study can solve the problem of blueberry fertilizer,fertilizer amount,fertilization period and proportion,and also solve the problem of soil acidification in blueberry.1,From the initial stage of 450 kg/hm~2 sulfur powder ditch changed,in a large number of elements of water soluble fertilizer application,soil pH is decreasing,but the excessive application of nitrogen and phosphorus under the condition of N4(N 133kg/hm~2)and P4(P2O5 133kg/hm~2)will aggravate the soil acidification(pH decreased 0.46-0.57),and the application of potassium fertilizer could slow down the decrease of pH value(pH decreased by 0.38-0.45).2,July 20th(the first 90 days after fertilization)soil organic matter decreased,but a large number of elements of the number and proportion of water soluble fertilizer had no significant effect on organic matter content,fruit harvest after a period of time will still return to the initial state;after the first fertilizer ammonium nitrogen release peak in about 20 days and the transformation of ammonium to nitrate about 10 days,90 days after the treatment to reduce the ammonium nitrate to the initial level is still higher than the initial value;low phosphorus level to ensure that the supply of phosphate fertilizer,phosphorus level low to ensure the growth of blueberry,and absorption of phosphorus mainly from fertilizer supply.Soil available potassium content reached the highest peak at 60 days,and the soil available potassium content began to decrease after fruit stage(60 days).3,The effect of P3(P 100kg/hm~2)on the growth and quality of tangerine was the highest,and N1(N,33kg/hm~2)was the biggest influence on cranberry growth,and N4(N 133kg/hm~2)was the worst quality indicator.Thus,under proper potassium application,phosphorus fertilizer can promote the vegetative growth and reproductive growth in the initial stage of blueberry growth,and nitrogen deficiency will inhibit the growth of blueberry.4,The highest yield is N3(N 100kg/hm~2)514.4g/strain,but the maturity lags behind,and the economic benefits of the fruit is low,which is suitable for deep processing of products.The yield of P3(P 100kg/hm~2)was 474.4g/strain,but the single fruit weight(3.15g)and the first pick(217.9 g/strain)were the highest in all treatments.Fruit is good,ripe early,suitable for fresh fruit sales.5,Second years of planting blueberry soil acidification trend increased,but the application of calcium magnesium phosphate,soil pH of 120 d decreased 0.15 to 0.24,compared with a large number of elements processed(pH by 0.38-0.57)the pH of the decline has slowed.