Study on the Effects of Different Fertilization Times on Crop Yield and Soil Fertility Changes

The level of soil fertility plays a decisive role in the growth and development crops agricultural production. Reasonable fertilization time is great significance for maintaining improving fertility, increasing crop yield, economic benefits. Rice one main grain China, its yield quality are influenced by natural environment, variety, water content, fertility. Among them, has greatest impact on rice. Within scope Design experiments, rice directly related to fertilizer application time. With increase time, increases significantly, fertilizers nutrient promoters play good ecological benefit. Although Biopesticide do not have large effect, they can same effect as chemical pesticides. amount used factor longterm also become an important yield. Different treatments different effects content vegetable fields, significantly content. This article takes example study times changes.