本文關(guān)鍵詞： 土壤養(yǎng)分 二分法 空間變異 合理取樣數(shù)　出處：《江蘇農(nóng)業(yè)學(xué)報(bào)》2017年03期 　論文類型：期刊論文

【摘要】：以江西省興國縣丘陵山區(qū)為例,取2 398個(gè)樣點(diǎn)并測(cè)定其土壤有機(jī)質(zhì)、有效磷和速效鉀含量。運(yùn)用半變異函數(shù)分析土壤養(yǎng)分的空間變異特征,再基于普通克里金法對(duì)樣點(diǎn)以固定比例進(jìn)行隨機(jī)抽樣,根據(jù)均方根誤差波動(dòng)的絕對(duì)值確定一個(gè)區(qū)間后,采用數(shù)學(xué)二分法進(jìn)一步研究取樣數(shù)。結(jié)果表明,有機(jī)質(zhì)的變異系數(shù)最大,有效磷次之,速效鉀最小;土壤有機(jī)質(zhì)、有效磷和速效鉀含量呈現(xiàn)中等空間相關(guān)性且變程較小;興國縣丘陵山區(qū)土壤有機(jī)質(zhì)、有效磷和速效鉀的合理采樣數(shù)分別為1 366、1 170、1 690,合理采樣密度分別為1 hm~20.044個(gè)、0.038個(gè)、0.055個(gè)。
[Abstract]:Taking the hilly areas of Xingguo County, Jiangxi Province as an example, 2,398 samples were taken and the contents of soil organic matter, available phosphorus and available potassium were determined. The spatial variation characteristics of soil nutrients were analyzed by semi-variance function. Based on the ordinary Kriging method, the sample points are randomly sampled in a fixed proportion, and an interval is determined according to the absolute value of the root mean square error fluctuation. The mathematical dichotomy is used to further study the sampling number. The results show that the coefficient of variation of organic matter is the largest. Available phosphorus was the second, available potassium was the least, soil organic matter, available phosphorus and available potassium content showed moderate spatial correlation and the variation range was small; soil organic matter in hilly and mountainous areas of Xingguo County, Xingguo County, The reasonable sampling numbers of available phosphorus and available potassium were 1366 ~ 1 170 ~ 1 690, and the reasonable sampling densities were 1 hm- 20.044 and 0.038 ~ 0.055, respectively.
【作者單位】： 江西農(nóng)業(yè)大學(xué)江西省鄱陽湖流域農(nóng)業(yè)資源與生態(tài)重點(diǎn)實(shí)驗(yàn)室/國土資源與環(huán)境學(xué)院;江西農(nóng)業(yè)大學(xué)林學(xué)院;
【基金】：國家自然科學(xué)基金項(xiàng)目(41361049) 江西省自然科學(xué)基金項(xiàng)目(20122BAB204012) 江西省贛鄱英才“555”領(lǐng)軍人才項(xiàng)目(201295)
【分類號(hào)】：S158

【相似文獻(xiàn)】

相關(guān)期刊論文 前10條

1 馮曉;喬淑;胡峰;馬中杰;;土壤養(yǎng)分空間變異研究進(jìn)展[J];湖北農(nóng)業(yè)科學(xué);2010年07期

2 姜麗娜,符建榮,范浩定;水網(wǎng)平原稻田土壤養(yǎng)分空間變異特性研究[J];中國水稻科學(xué);2005年02期

3 陳署晃;馬興旺;許詠梅;何生麗;郭海峰;李毳;嚴(yán)莉;李平;蔣文;楊紅麗;;烏魯木齊縣蔬菜地土壤養(yǎng)分空間變異研究[J];新疆農(nóng)業(yè)科學(xué);2006年01期

4 盛建東;肖華;武紅旗;陳冰;王軍;楊新建;田建華;楊朔;錢文東;楊艷;;不同取樣間距農(nóng)田土壤全量養(yǎng)分空間變異特征研究[J];土壤通報(bào);2006年06期

5 王冠;張力仁;;玉米精準(zhǔn)作業(yè)系統(tǒng)中土壤養(yǎng)分空間變異圖的制作技術(shù)研究[J];安徽農(nóng)業(yè)科學(xué);2008年32期

6 王仕t，

本文編號(hào)：1494991