specific management SSM Variable rate fertilizer application VRA AB-DTPA 0.5 mol/l NaHCO 3 ICP DOI: /j.cnki.tr

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1 DOI: /j.cnki.tr (Soils), 2004, 36 (3): 243~ (AB-DTPA0.5 mol/l NaHCO mol/l CaCl 2 Kelowna - ) S151.9 [1] N [2] (5 ~ 10 ) Site ICP Mehlich-3 -DTPA specific management SSM Variable rate fertilizer applicationvra [3] mol/l NaHCO 3 N NO - 3 -N NH + 4 -N N P K NH + 4 -N N NO - 3 -N K K Na K 2:1 K 50 AB-DTPA Na K K [4] N [2] NO - 3 -N P K ICP N (KZCX2-404) 2001AA245013

2 N [5] [6] 6 Mehlich-3 [19] Mehlich-3 20:1 K Mehlich-3 Mehlich-1 [13] AB-DTPA AB-DTPA Mehlich-3 1 mol/l NH 4 HCO mol/l DTPA ph=7.6 ph(h 2 O)> mol/l CaCl 2 ph Na Ca [3] P NO - 3 -N K AB-DTPA ph P Bray-1K [20] NO - 3 -N [7] AB-DTPA K NH + 4 -NP K CaCl 2 [8] [6] AB-DTPA P K K K Mehlich-3 NH + 4 -N N NO - 3 -N [9] AB-DTPA P Olsen-PMehlich-3 CaCl 2 P Olsen P [24] P Mehlich-3 CaCl 2 P Olsen-P 0.2 mol/l HOAc-0.25mol/L NH 4 NO mol/l NH 4 F mol/l HNO mol/l EDTA [26] P PK [20,27] Mehlich-3 Bray-1 Mehlich-1 Mehlich-3 P Mehlich-2 [10,11] Bray-1 [12~14] Mehlich-1 [14] Olsen [15] K [20] CaCl 2 K [10~13,16,17] Mehlich-3 P [9] Mehlich-3 K Mehlich-2 [10,11] [12] K [15] Bray mol/l HOAc [14] Mehlich mol/l NH 4 F K [7,10,15] van Lierop [29] EDTA DTPA Qian [30] [13] Mehlich-1 PK [14] Mehlich-3 (, P [18] P K ) [29] mol/l CaCl 2 C N PKNaS [21, 22] [22, 23] Olsen [20] [25] CaCl 2 P 5 Ca P P [24, P 27] CaCl 2 K K [28] 0.01 mol/l CaCl 2 NO - 3 -N

3 mol/l SrCl mol/l [21,26] Sr Ca NO - 3 -NNO - 2 -NPO 3-4 K + ICP AlCa NH 4 NH + 4 -NNO - 3 -NPKCa Mg Mehlich-3 Padarauskas [38] NO - 3 -N NH + 4 -N NH + 4 -N NO - 3 -N 2 mol/l KCl [31] Mehlich-3 15cmol/kg - K [32] - P Olsen Bray-1Mehlich-3 Bray mol/l HCl - P Olsen Mehlich-3 P - Olsen Mehlich-3 3 P P - [33] [21] [37] P [19] [24,34] [39] P 0.01 mol/l CaCl ~ 10 mg/l [40] [35] Zbiral [39] Mehlich-3 Mehlich-3 K 2 % ICP ~ 8 % 0.01 mol/l CaCl 2 K 0.06 ~ 20 mg/l [41] Na Cs NO - 3 -N 0.5 mg/kg [42] NO - 3 -NNO - 2 -N P Cl [43] NO - 3 -N CaCl 2 [44] Coated wire electrodecwe NO - 3 -N (Aliquate 336s)NO - 3 -N [36] A NO - 3 -N P P P [45]

4 Chen [46] NP K P P Co 3 (PO 4 ) 2 ph 1mol/L ~ mol/l K K Na + H + + NH 4 PVC K K ph NH + 4 [47] 0.5 mol/l BaCl 2 K NH + 4 [48] (1) ISFET (2) (3) (4) [49] ISFET (5) long-term drift NPK ICP-AES ISFET (6) ISFET/FIA (Ion-selective field effect transistor/ (7) Flow injection analysis) [50] NO - 3 -N 1.25 s [51] Ca NaKNO N NH 4 Arce [52] - 10 min Skotnikov [53] Automated unit for soil sample preparation and processing AUSSPP

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8 MODERNIZATION OF SOIL NUTRIENT ANALYSIS LI Li-ping ZHANG Jia-bao XING Wei-qin ZHANG Jun XIN Xiu-li ( Institute of Soil Science,Chinese Academy of Sciences, Nanjing ) Abstract Development of agriculture and the need for better environment require more soil samples being analyzed in shorter time for soil nutrient information, as a result, modernization of soil nutrient analysis is the way we must choose. This paper reviewed progress in application of universal extractants (such as AB-DTPA, 0.5 mol/l sodium bicarbonate, 0.01 mol/l calcium chloride, Kelowna, strontium-citric acid solution and water), application of instrumental analysis (such as flow analysis, capillary electrophoresis, liquid chromatography, atomic emission spectrometry and electrode) for soil nutrient analysis, and automation of soil sample collection and analysis in the last 20 years. However, mixing of soil sample and soil moisture determination are still two problems in the automation of soil nutrient analysis. To compromise between the analysis speed and the accuracy is recommended as the solution. Key words Soil nutrient, Analysis, Universal extractant, Instrumental analysis, Automation ************************************************************************************************ :,1993, 217 ~ 239, 1993, 39 ~ 41 4,..,. :. 2001, 22 (4): 216 ~ 219. :, 2001, 35 ~ :,, 2001, 33 (6): 300 ~ : 9,,,., 2001, 7 ~ : 7,, 8,,.,, 2002, 34 (6): 293 ~ 302 PROTECTION AND SUSTAINABLE UTILIZATION OF CULITIVATE LAND RESOURCE IN HUNAN PROVINCE LIU Hai-jun TAN Kun LUO Zun-chang ( Hunan Soil and Fertilizer Research Institute, Changsha ) Abstracts According to the intensified contradiction between population and cultivated land in Hunan Province, the current situation, problems and their causee were analyzed. The countermove and measure adopted to realize sustainable utilization or land resource were put forward in the respects of policy and law, land leveling, management, monitoring and preservation, correlated ecosystem protection, and adjusting of agricultural structure. Key words Culitivate land resource, Protection, Sustainable utilization, Hunan Province