,8660 c
40-60
,6539 b
,7235 d
,5919 a
,6954 c
,7406 de
,7730 f
,7486 e
,7479 e
60-80
,5172 a
,5773 cd
,5311 ab
,5448 abc
,7782 f
,5901 de
,5657 bcd
,6245 e
80-100
,3556 a
,3947 b
,3971 b
,4694 c
,5021 cd
,5047 d
,5047 d
,4818 cd
100-120 ,2312 ab
,3244 d
,2498 bc
,2059 a
,3264 d
,3219 de
,2853 cd
,3026 de
120-140
,1318 a
,1632 ab
,2498 d
,2508 d
,2385 cd
,1951 bc
,2121 cd
,2227 cd
140-160 ,1572 ab ,1617 abc
,2498 d
,1933 bc
,2008 c
,2438 d
,1268 a
,1424 a
160-180
,1697 b
,2348 cd
,2583 d
,2222 c
,1883 b
,2926 e
,1268 a
,1172 a
180-200
,1074 a
,2348 d
,1249 a
,2008 cd
,1757 bc
,1951 cd
,1390 ab
,0990 a
200-220
,1499 c
,1349 bc
,1413 c
,2008 d
,1255 bc
,0834 a
,1146 abc
,0990 ab
220-240
,1324 d
,1267 cd
,1357 d
,1255 cd
,0628 a
,0771 a
,0866 ab
,1053 bc
240-260
,0949 a
,0780 a
,1385 b
,2008 c
,0753 a
,0992 a
,0829 a
,0743 a
260-280
,0824 a
,1125 ab
,1520 b
,1506 b
,1004 a
,0708 a
,0829 a
,0806 a
280-300 ,0999 ab
,1267 b
,1291 b
,1933 c
,1004 ab
,1244 b
,0829 a
,0619 a
300-320 ,1199 ab
1389 bc
,1745 cd
,2008 d
,1255 ab
,0975 ab
,0902 a
,1231 ab
320-340
,1449 b
,2099 c
,0804 a
,3306 d
,1255 b
,1146 ab
,1073 ab
,1261 b
340-360 ,1449 bc
,1876 d
,1291 abc
,3393 e
,1506 c
,1146 a
,1317 abc
,1240 ab
360-380 ,1449 cd
,1632 d
,1269 bc
,2987 e
,1506 cd
,1204 ab
,1024 a
,1177 ab
380-400
,1574 c
,1369 bc
,1047 ab
,2436 d
,1506 c
,0975 a
,1354 bc
,1055 ab
0-400 cm ,2585 a
,2972 c
,2757 b
,3429 d
,2962 c
,2934 c
,2740 b
,2784 b
Table 13. Content of Corganic by layers up to 400 cm according to the fertilization variants 110
Agricultural Science
Depth cm N0P0K0
N60P0K0 N120P0K0
N180P0K0
N0P180K0 N60P180K0 N120P120K120 N180P60K60
0-20
,8055 d
,6837 a
,8779 e
,7366 bc
,7667 c
,7124 ab
,7553 c
,8085 d
20-40
,7490 bc ,7655 bc
,7892 c
,6235 a
,7154 abc
,6840 ab
,7716 bc
,8045 c
40-60
,5700 b
,6889 d
,6494 cd
,5053 a
,5762 b
,5785 b
,7479 e
,6384 c
60-80
,4805 c
,5654 e
,4028 b
,4616 c
,3326 a
,5526 de
,5132 cde
,5096 d
80-100
,3492 b ,4146 bc
,4150 bc
,2585 a
,4840 d
,3856 bc
,3653 b
,4376 cd
100-120
,2241 b
,2325 b
,1707 a
,2147 ab
,3262 cd
,2901 c
,3586 d
,2979 c
120-140
,1989 bc
,2370 c
,0489 a
,0885 a
,2082 bc
,1558 b
,2142 c
,2211 c
140-160
,1329 b ,1777 bc
,0402 a
,1344 bc
,1820 c
,0694 a
,1748 bc
,1767 bc
160-180
,0798 b ,0552 ab ,0415 ab
,0563 ab
,1250 c
,0206 a
,1545 c
,1497 c
180-200
,1188 c
,0204 a
,1216 c
,0341 ab
,1549 c
,0427 ab
,0988 bc
,1592 c
200-220
,0995 b
,1000 b
,1256 bc
,0341 a
,1239 bc
,1777 c
,1348 bc
,1795 c
220-240
,1286 abc ,0880 ab ,1196 abc
,0804 a
,1548 bc
,1608 c
,1513 abc
,1239 abc
240-260
,1342 bc ,1367 bc ,0848 ab
,0341 a
,1509 c
,1502 c
,1346 bc
,1549 c
260-280
,1467 c
,1021 bc ,0540 ab
,0321 a
,1084 bc
,1555 c
,1230 c
,1254 c
280-300
,1379 b
,1083 b
,0942 ab
,0313 a
,1258 b
,1366 b
,1230 b
,1557 b
300-320
,2020 c
,1802 bc
,0924 a
,1182 ab ,1471 abc ,1635 abc
,1389 abc
,1438 abc
320-340
,1886 b
,1904 b
,2096 b
,0460 a
,1674 b
,1667 b
,0783 a
,1726 b
340-360
,1857 b
,1663 b
,1377 b
,0624 a
,1597 b
,1870 b
,0655 a
,2473 c
360-380
,1364 bc
,1877 c
,1283 bc
,0277 a
,1075 b
,1610 bc
,1151 b
,2565 d
380-400
,0804 abc
,1706 e ,1012 bcd ,1330 cde
,0466 ab
,1403 de
,0387 a
,2483 f
0-400 cm
0,2557 c 0,2629 c 0,2339 b
0,1860 a
0,2569 c
0,2544 c
0,2641 c
0,3000 d
Table 14. Content of Cresidue by layers up to 400 cm according to the fertilization variants The percent of Corganic in comparison to Ctotal of soil varied within a wide range: from 43.11 %
in the variant with N180P60K60 to 71.51% in N18P0K0. With the exception of systematic
introduction of N180P60K60, all other fertilization variants involved in the study contributed to the higher percent of the total humus substances in Ctotal of soil. The results from the investigation on the changes of organic C of soil showed that the independent nitrogen
fertilization, especially with annually applied high norms, had a strong negative effect on the mobility of the organic substance and caused serious decrease of the percent of carbon in the insoluble residue.
The carbon of humic and fulvic acids (HA and FA) also varied considerably depending on
the mineral fertilization (Fig.5). Regardless of the lower values of C of HA and FA down the soil profile, the variations between the fertilization variants were significant to a maximum degree, averaged for 0-400 cm depth. They were not significant for C-HA in the 0-40 cm
layer and for C-FA in the 200-220 cm and 240-260 cm layers. Highest differentiation in the values of C-Ha between the fertilization variants was found in the 80-100 cm and 360-380 cm layers, and of the values of C-FA – in the 360-380 cm layer. Averaged for the investigated depth of 400 cm, variant N180P0K0 had highest content of C-HA, exceeding the check variant with 24.9 %. A considerable increase of C-FA according to the check was determined after
systematic application of N180P0K0 – with 60.1 %, of N60P180K0 – with 72.3 %, and of
N180P60K60 – with 70.0 %.
