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小麥拔節(jié)期農(nóng)學(xué)參數(shù)和土壤含水量空間統(tǒng)
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Statistic Properties of Agronomic Parameters and Soil Moisture Content in Wheat Jointing Stage
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    摘要:

    選取山東省陵縣的小麥試驗(yàn)示范基地作為樣區(qū),采用GPS定位調(diào)查,獲取田間21個(gè)樣點(diǎn)的土壤和小麥植株樣品,運(yùn)用TDR300測(cè)定樣點(diǎn)土壤含水量,利用SPAD-502葉綠素儀測(cè)定采樣點(diǎn)拔節(jié)期小麥植株葉片的葉綠素含量,獲取小麥干物質(zhì)產(chǎn)量信息。基于地統(tǒng)計(jì)學(xué)原理,結(jié)合空間分析技術(shù),探討了小麥葉綠素含量、干物質(zhì)產(chǎn)量等農(nóng)學(xué)參數(shù)信息和土壤含水量的空間變異特征。研究結(jié)果表明,土壤水分和小麥葉綠素含量的空間變異呈強(qiáng)的空間相關(guān)性,結(jié)構(gòu)性因素引起的空間變異分別占到總變異97.3%和81.3%。小麥干物質(zhì)產(chǎn)量具有中等程度的空間變異性,由結(jié)構(gòu)性因素引起的變異占到總變異的50%。土壤含水量、小麥葉綠素含量Kriging插值空間分布呈現(xiàn)明顯的片狀和斑塊狀特點(diǎn),小麥干物質(zhì)產(chǎn)量Kriging空間分布具有明顯的帶狀分布特點(diǎn)。

    Abstract:

    The experimental area was selected in Lingxian County of Shandong Province. Based on the GPS positioning data, soil moisture content, chlorophyll content and wheat dry matter production was measured. Geostatistical analysis was conducted combined with geographical information system (GIS) and the semivariogram models were established. It was found that a spherical model fit semivariogram model of soil moisture content better, and a Gaussian model was the better model for wheat chlorophyll content and dry matter production. The results showed soil moisture content and wheat chlorophyll content had the strong spatial autocorrelation, and the ratio of structural variation was 97.3% and 81.3%. Wheat dry matter production has the medium spatial autocorrelation, and the structural variation was 50%. Block Kriging was applied, and the spatial distributing maps and maps of standard deviation of Kriging estimates were drawn. From the distribution types, it was observed that the Kriging estimates maps of soil moisture content and wheat chlorophyll content had obvious slabby and plaques characteristics while the map of wheat dry matter production had ribbon characteristics.

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楊玉建,朱建華,劉淑云,唐研,劉延忠,封文杰.小麥拔節(jié)期農(nóng)學(xué)參數(shù)和土壤含水量空間統(tǒng)[J].農(nóng)業(yè)機(jī)械學(xué)報(bào),2009,40(Z1):159-164. Statistic Properties of Agronomic Parameters and Soil Moisture Content in Wheat Jointing Stage[J]. Transactions of the Chinese Society for Agricultural Machinery,2009,40(Z1):159-164.

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