云南作物生产潜力的海拔修正对耕地自然等别评价结果的影响
作物光温生产潜力(thermal potential productivity,TPP)、气候生产潜力(climatic potential productivity,CPP)是农用地质量分等技术体系中的重要参数,其客观性对分等结果的准确性有很大影响。在耕地分布海拔差异较大的区域,实际工作中以县级气象站点TPP、CPP代替全县域TPP、CPP的取值方式导致耕地质量评价结果的准确性不足。该文旨在通过对气象站点指定作物TPP、CPP进行海拔修正,获取陆良县气象站点以外区域的指定作物潜力值并探讨其对耕地自然质量等的影响。首先,以第1轮云南省农用地分等工作中陆良县归属的滇中高原盆地区56个县级气象站点...
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Published in | 农业工程学报 Vol. 32; no. 23; pp. 246 - 253 |
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Main Author | |
Format | Journal Article |
Language | Chinese |
Published |
云南农业大学水利学院,昆明 650201
2016
云南农业大学水利学院,昆明 650201%国土资源部“土地利用--云南陆良野外基地”,昆明,650201 云南农业大学国土资源科学技术工程研究中心,昆明 650201 国土资源部“土地利用--云南陆良野外基地”,昆明 650201%云南农业大学国土资源科学技术工程研究中心,昆明 650201 |
Subjects | |
Online Access | Get full text |
ISSN | 1002-6819 |
DOI | 10.11975/j.issn.1002-6819.2016.23.034 |
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Summary: | 作物光温生产潜力(thermal potential productivity,TPP)、气候生产潜力(climatic potential productivity,CPP)是农用地质量分等技术体系中的重要参数,其客观性对分等结果的准确性有很大影响。在耕地分布海拔差异较大的区域,实际工作中以县级气象站点TPP、CPP代替全县域TPP、CPP的取值方式导致耕地质量评价结果的准确性不足。该文旨在通过对气象站点指定作物TPP、CPP进行海拔修正,获取陆良县气象站点以外区域的指定作物潜力值并探讨其对耕地自然质量等的影响。首先,以第1轮云南省农用地分等工作中陆良县归属的滇中高原盆地区56个县级气象站点指定作物的TPP、CPP为基础,生成区域内一季稻、夏玉米、冬小麦TPP、CPP的海拔修正模型;其次,在陆良县县域范围内,每村各选取一块质量最好的旱地和水田,以样点旱地、样点水田作物实际单产验证模型的合理性;最后,验算陆良县范围内所有耕地采用修正后的TPP、CPP评定的自然质量等与采用修正前的TPP、CPP评定的自然质量等的差异。结果显示:各样点一季稻、夏玉米、冬小麦的实际单产均低于修正前和修正后的TPP、CPP,且与修正后的TPP、CPP随海拔的变化趋势一致;修正后的一季稻、夏玉米、冬小麦TPP、CPP较修正前更符合自然实际;全县修正后的耕地自然质量等较修正前变化范围为?0.8-1.7等,且99.76%的耕地自然质量等较修正前降低值在1.5等以内。 |
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Bibliography: | Crop potential productivity(PP) refers to the highest yield of fine crop variety per unit area that might be obtained assuming all or part of the factors are in the optimum state. Thermal potential production(TPP) refers to the highest yield of ideal crop colony in the condition of local sunlight and temperature assuming that the agricultural production condition has been fully guaranteed in adequate supply of water, CO2 and suitable states of other environmental factors, while climatic potential production(CPP) refers to the theoretical yield of crops taking precipitation effect into further consideration based on TPP. The "Regulation for Gradation on Agriculture Land Quality" GB/T 28407-2012(Regulation) provides the crops' TPP and CPP nationwide according to the reports of sowing/harvest date from all provinces, and the meteorological data of 2231stations from the National Meteorological Administration within 30 years(1961-1990). Each county just provides one set of TPP and CPP data for appointment crop acc |
ISSN: | 1002-6819 |
DOI: | 10.11975/j.issn.1002-6819.2016.23.034 |