关键词: 产量, 产量

Abstract:

In order to establish high efficient fertilization technique system for rapeseed production in Hubei Province. This survey was conducted by spot field investigation to study the present situation of nutrient management and the problems existing in the fertilization technique on rapeseed by five rotation systems in Hubei Province. The results showed that, only 20.2% and 69.4% of the surveyed farmlands applied organic fertilizer and boron in rapeseed plating. The average application amount of nitrogen (N), phosphate (P) and potassium (K) fertilizer were 203.7, 71.3, 50.2 kg/hm2 respectively, which ratio was 1:0.35:0.25, and rapeseed average consume about 49.3%, 51.6% and 50.8% of the total N, P and K fertilizer used for a rotation period. The problems in rapeseed rotation systems nutrient management were displayed as follow: farmers applied excessive N fertilizer, and ignored the application of P and K fertilizer, especially for K. The ratio of N, P and K was imbalanced and the application amount of fertilizer different in regions and farmers. Excess and insufficient fertilization coexisted. The concept of the nutrient co-ordination by various rotation systems needed to be promoted. In addition, the application amount of the organic manure was low and the use of boron fertilizer need to popular. It suggested that, the nutrient management should take the characteristics of crop nutrient physiology need and cropping systems into consideration. At the same time, it’s important to establish a new concept of sustainable agriculture fertilizer, so as to achieve maximum nutrient resources and promote the development of rapeseed and other planting.