Remoter sensing evaluation method of optimization crop ration cycle

Remoter sensing evaluation method of optimization crop ration cycle

  • CN 1,794,283 B
  • Filed: 12/29/2005
  • Issued: 08/28/2013
  • Est. Priority Date: 12/29/2005
  • Status: Active Grant
First Claim
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1. the optimized remote sensing evaluation method in a crop rotation cycle, evaluation object are to make crops production obtain the period of crop-rotation of ecological and economic benefit;

  • At first in big geographic area, select the crop rotation condition, ecological and economic benefit is best crop rotation zone as optimum crop rotation zone, then decipher is carried out in the crops variation spatially in optimum crop rotation zone in the remote sensing image, and with the data of decipher result as the estimation crop rotation cycle, set up actual period of crop-rotation that relevant formula and substitution interpret data estimate crops again as the optimum period of crop-rotation, final again with periods of crop-rotation of this crops in other crop rotation zone and the optimum period of crop-rotation relatively, realize the optimum evaluation to this crop rotation cycle;

    At first in big geographic area, select crop rotation condition, ecology and economic benefit to be best crop rotation zone and refer to that as optimum crop rotation zone the selection in the optimum crop rotation of crops zone mainly realizes by six steps, at first select several candidate crop rotation zones, dividing region is by administrative division, perhaps by agricultural regionalization;

    Secondly, crop rotation chance and the cost in different crop rotation zones are assessed, the zone that selection crop rotation chance is many and the crop rotation cost is low is as the candidate zone;

    The 3rd, analyze the quantity of employed agricultural chemicals aspect the control disease and pest relevant with crop rotation, select the few zone of use pesticide volume as the candidate zone;

    The 4th, analyze the minimizing situation that the crop rotation disease and pest causes crop yield, select the few zone of output reduction as the candidate zone;

    The 5th, analyze the situation that crop rotation increases crop yield, select the many zones of volume increase as the candidate zone;

    The 6th, the analytical approach of employing comparative advantages is carried out comprehensive assessment to various factors described here, determines that in the crop rotation condition economy and ecological benefits aspect have the zone of clear superiority as the optimum crop rotation zone of crops;

    Setting up the actual period of crop-rotation that relevant formula and substitution interpret data estimate crops again refers to that as the optimum period of crop-rotation following is that the described mathematical formulae of example, derivation, result of calculation and application process are applicable to the period of crop-rotation of all crops and the estimation of spatial variations with C crops and R crop rotation;

    After the interpret data of M the small towns N continuous year remote sensing satellite image that has obtained C crops and R crop rotation zone, calculate C crops and R crop rotation cycle with following formula,

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