Soil sulfur supply assessment using anion exchange resin strip-plant root simulator probe

文献类型： 外文期刊

第一作者： Li, ST

作者： Li, ST;Lin, B;Zhou, W

作者机构：

期刊名称：COMMUNICATIONS IN SOIL SCIENCE AND PLANT ANALYSIS （ 影响因子：1.327； 五年影响因子：1.315 ）

ISSN： 0010-3624

年卷期： 2001 年 32 卷 5-6 期

页码：

收录情况： SCI

摘要： A new soil test method for determining soil available sulfur (S) using an anion exchange resin strip, a specially pretreated anion exchange membrane encased in a plastic applicator-Plant Root Simulator Probe, was evaluated. Samples of 18 China soils were collected from the 0-20 cm layer, dried, sieved, and analyzed for available S using four chemical extracting solutions: 0.01 mol calcium chloride (CaCl2) L-1, 0.01 mol calcium dihydrogen phosphate [Ca (H2PO4)(2)] L-1, 0.016 mol potassium dihydrogen phosphate (KH2PO4) L-1, and 0.5 mol sodium bicarbonate (NaHCO3) L-1 (pH 8.5). Available S in soils was also extracted by a resin strip method with 24-hour and 2-week burial times. Pot experiments were conducted to compare plant response to determined soil-available S. Results showed that soil-available S extracted by the resin strips at 24 hour and 2 week burial times was significantly correlated with S extracted by the chemical methods, especially highly and significantly correlated with available S by 0.01 mol Ca (H2PO4)(2) L-1 (r(2) = 0.725*** and r(2) = 0.600***) and 0.016 mol KH2PO4 L-1 (r(2) = 0.706*** and r(2) = 0.540***), respectively. Resuits also showed significant correlation between S availability by the resin strips at the two burial times and plant S uptake (r(2) = 0.594***, r(2) = 0.401** for corn and r(2) = 0.773***, r(2) = 0.546*** for rice). Furthermore, results showed significant correlation bt tween determined S by the resin strip at the 24 hour burial time and relative dry matter yield for corn (r(2) = 0.494**) and rice (0.687***), respectively. An anion exchange resin strip was found to be a suitable alternative method in the evaluation of S bioavailability in soils.

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