کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
2025165 | 1069984 | 2011 | 4 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Extraction of soil nitrogen by chloroform fumigation – A new index for the evaluation of soil nitrogen supply Extraction of soil nitrogen by chloroform fumigation – A new index for the evaluation of soil nitrogen supply](/preview/png/2025165.png)
The N extracted after chloroform (CHCl3) fumigation was determined as a possible index of soil N supply to plants. The relationships between extractable N following fumigation and reference indices such as total N, alkali-hydrolyzable N, N released by the Stanford short-term incubation method, and the N extracted by KCl and by CaCl2, were measured in nine soils of differing soil N supply capacity. A highly significant correlation was achieved between the extractable N released by fumigation and the N released by the Stanford method, i.e. a short-term aerobic incubation (r = 0.87). Similarly, the correlation between extractable N by fumigation and the N uptake by ryegrass was highly statistically significant (r = 0.93). Using the N extracted following fumigation has the advantage that laboratory results are available in two days and are both reproducible and of high precision. Therefore, the N extracted following fumigation is a valid, timesaving and precise index of soil N supply capacity.
► Significant correlation: N released by Stanford method and CHCl3 fumigation.
► Significant correlation: extractable N by fumigation and ryegrass N uptake.
► The N extracted following fumigation is a valid index of soil N availability.
Journal: Soil Biology and Biochemistry - Volume 43, Issue 12, December 2011, Pages 2423–2426