Study Of The Fertilization Of Greenhouse Strawberry Under Rice-Strawberry Rotation

Over the past few years in Hanzhong city, growing strawberry in sheds in the system of dry-land and irrigated land rotation has become a new and expanding project since the readjustment of industrial structure in rural areas; meanwhile some problems arose with its development. In order to meet the technological needs and find out a solution to the right standards of fertilizer application for this system, the author has explored and made some achievements.Taking the base-fertilizer and top-application as two essential factors for shed-growing strawberry, this experiment has designed six procedures to probe into the right amount and best solutions to the top-application for shed growing of strawberry. In addition, the experiment has studied the three key elements as N,P₂O₅,K₂O and implemented 12 kinds of compounding of different amounts through random group trials so that the best formula of fertilizers is found out.The result shows that if some organic-fertilizers has been applied to shed strawberry and the inorganic-fertilizers lack any of N,P,K in its formula, the yields will be influenced a lot. The lands with concentrated fertilizers have a higher productivity than those with low-fertilizers, and there are no marked differences when processed by concentrated fertilizers. The most effective application of fertilizers should be (N)14kg/667m² ,(P₂O₅) 14kg/667m²,(K₂O) 14kg/667m² , the appropriate proportion between the three is 1:1:1; it is better to apply 40% of base-fertilizers and 60% of top-application. When top-application is applied, it is advised to focus on the top-application after the first pick and use more than 20% of total amount of fertilizers at this time than usual. What's more, different methods of applications usually don't have any effect on the blossom, bearing of strawberry and the deformed occurrence of the deformed fruits.