Fuzzy decision system for ecological distribution of citrus in north-cultivated-marginal area

Abstract

Abstract: The fuzzy decision system for ecological distribution of citrus in north-cultivated-marginal area was established by using the data of mean extreme low temperature, accumulated active temperature (≥12.5℃), mean temperature in coldest month, annual mean temperature integrated with annual precipitation, days with mean extreme low temperature below -9℃,physiognomy, elevation, inland water body, cold air barrier, and soil nutrition and pH value. The complex reasoning model with imprecision was used in the decision system by introduction of L-R fuzzy number and recognition formula, which made the decision system have a wide range of application in practice. An example of applying the decision system was tested in Anhui province. The result showed that the development of the decision system would provide a useful tool for the decision of the ecological distribution of citrus in north-cultivated-marginal area.

Key words: Citrus, Ecological distribution, Fuzzy, Decision system, Torreya grandis ‘Merrillii’, cultivation history, microbial diversity, Illumina sequencing, rhizosphere soil

CLC Number:

S666

ZHU Liwu, LI Shaowen, KONG Juanjuan, JIA Bing. Fuzzy decision system for ecological distribution of citrus in north-cultivated-marginal area[J]. Chinese Journal of Applied Ecology, 2003, (4): 502-506.

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