A method for precise topdressing of hybrid rice

Abstract

The invention discloses a hybrid rice accurate topdressing method, which comprises the following steps of step 1, variety parameter data collection; step 2, use of a crop growth monitoring-diagnosis instrument; step 3, determination of canopy spectral reflectance and a leaf area index (LAI); step 4, localization of a hybrid rice growth index monitoring model; step 5, application amount recommending; step 6, field file recording. According to the hybrid rice accurate topdressing method provided by the invention, the rice canopy spectral reflectance is collected by the crop growth monitoring-diagnosis instrument, monitoring and diagnosis are performed in a rice booting stage and a rice growth stage, a spectral vegetation index and a real-time leaf area index number are calculated, and a to-be-recommended application amount of panicle fertilizer pure nitrogen at the rice booting stage is produced, so that blind topdressing of a panicle fertilizer in a rice production process is avoided, and technical support is provided for increasing the rice yield per unit area and a big field accurate cultivation and management level.

Description

technical field

[0001] The invention belongs to the technical field of crop planting, and relates to a method for precise topdressing of hybrid rice, in particular to a method for precise topdressing of hybrid rice based on a crop growth monitoring and diagnostic instrument. Background technique

[0002] Rice is one of the main food crops in China and plays an extremely important role in China's food security and social and economic development. In the current situation that the area of ​​cultivated land remains unchanged or even decreases throughout the year, further increasing the yield of rice through scientific and technological innovation is the only way to solve the food problem. Hybrid rice is a representative of high rice yield. In the past ten years, the yield of hybrid rice in my country has increased from 700 kg to 1,000 kg per mu. The breeding targets of 700kg per mu for the first phase, 800kg per mu for the second phase, 900kg per mu for the third phase, and 100...