本文選題：吉林省 + 農(nóng)田�。� 參考：《土壤通報(bào)》2017年02期

【摘要】：本研究通過分析2005~2013年測土配方施肥項(xiàng)目在吉林省采集的大量土壤樣品,明確了不同地區(qū)農(nóng)田耕層土壤pH的空間變異特征,并與第二次土壤普查數(shù)據(jù)對(duì)比探討了土壤pH的變化趨勢。結(jié)果表明,目前吉林省農(nóng)田耕層土壤pH分布在3.8~9.1之間,平均值為6.5。不同類型農(nóng)田土壤pH的高低順序?yàn)?黑鈣土風(fēng)沙土草甸土黑土白漿土≈暗棕壤水稻土�？臻g上,吉林省農(nóng)田耕層土壤呈現(xiàn)自西向東逐漸降低的分布特征,以西部白城市的通榆縣最高而東部延邊朝鮮族自治州的汪清縣最低。時(shí)間上,與第二次土壤普相比,吉林省各種土類的pH存在共性的土壤酸化趨勢。不同土類間pH的降幅存在較大差異,代表性的黑土下降約0.5個(gè)單位,酸化程度較大的草甸土和水稻分別下降了1.4和1.6個(gè)單位,而酸化程度較小的白漿土下降了0.1個(gè)單位。吉林省農(nóng)業(yè)生產(chǎn)中應(yīng)控制化肥用量,調(diào)整肥料品種,合理增施有機(jī)肥,大力推廣秸稈還田,從而緩解土壤酸化趨勢,改善土壤肥力。
[Abstract]:Based on the analysis of a large number of soil samples collected in Jilin Province from 2005 to 2013, the spatial variation characteristics of soil pH in different regions of farmland were determined. Compared with the data of the second soil census, the change trend of soil pH was discussed. The results showed that the pH distribution of cultivated soil in Jilin Province was between 3.8N and 9.1, with an average value of 6.5. The order of soil pH of different types of farmland is as follows: Aeolian soil, sandy soil, meadow soil, black soil, white soil, clay 鈮，

本文編號(hào)：1847619