Micro-fertilizers: Effects on the Properties of Super Absorbent Polymer Synthesized by Nuclear Technology

doi:10.11924/j.issn.1000-6850.casb20190700434

Abstract

Abstract:

To explore the effect of micro-fertilizers on the properties of super absorbent polymer (SAP) developed by the Institute of Biotechnology and Nuclear Technology, Sichuan Academy of Agricultural Sciences, the SAP was tested by six kinds of micro-fertilizer solutions with agricultural concentration and saturated concentration, the change of properties and morphological structure of SAP were observed through repeated water absorption tests. The results showed that borax and ammonium molybdate solution had little effect on the morphological structure of SAP. The other four kinds of bivalent metal micro-fertilizer solutions could destroy the structure of SAP in varying degrees, and the shape of SAP was changing from granular to schistose. The water absorbency of SAP for inhaled micro-fertilizers were decreased and showed the color of the micro-fertilizers, but most of the water absorbency could be gradually increased under the treatment of deionized water. The water absorbency of SAP with borax and manganese sulfate saturated solution treatments were 78.2 g/g and 4.83 g/g, then through deionized water treatments, the water absorbency reached 347 g/g, 277 g/g. During the 0.2% zinc sulfate and copper sulfate solution treatments, the water absorbency was 74.4 g/g and 60.0 g/g, respectively. After deionized water treatments, they reached 367 g/g and 232 g/g. Therefore, micro-fertilizers can reduce the water absorbency and accelerate the degradation rate of SAP, but it can still play the role of water and fertilizer retaining. In order to improve the utilization ratio of soil water and fertilizer, suitable concentrations of micro-fertilizers are better applied together with this SAP.

Key words: super absorbent polymer (SAP), micro-fertilizer, water absorbency, morphological structure, repeated water absorption

CLC Number:

S157.9

Wei Min, Luo Longxin, Yang Pinghua, Yan Qinghai, Liu Ying. Micro-fertilizers: Effects on the Properties of Super Absorbent Polymer Synthesized by Nuclear Technology[J]. Chinese Agricultural Science Bulletin, 2020, 36(24): 54-58.

Figures/Tables 3

References 29

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处理	4次微肥溶液中吸水倍数/(g/g)				3次去离子水中吸水倍数/(g/g)
处理	1	2	3	4	5	6	7
0.3%硼砂	139	73.6	71.8	65.0	108	209	324
0.1%钼酸铵	116	93.1	100	107	199	315	323
去离子水	308				351	428	499

处理	4次微肥溶液中吸水倍数/(g/g)				3次去离子水中吸水倍数/(g/g)
处理	1	2	3	4	5	6	7
0.3%硼砂	139	73.6	71.8	65.0	108	209	324
0.1%钼酸铵	116	93.1	100	107	199	315	323
去离子水	308				351	428	499

处理	微肥溶液中吸水倍数/(g/g)	4次去离子水中吸水倍数/(g/g)
处理	1	2	3	4	5
硼砂饱和溶液	78.2	117	213	279	347
钼酸铵饱和溶液	28.7	51.4	76.0	165	265

处理	微肥溶液中吸水倍数/(g/g)	4次去离子水中吸水倍数/(g/g)
处理	1	2	3	4	5
硼砂饱和溶液	78.2	117	213	279	347
钼酸铵饱和溶液	28.7	51.4	76.0	165	265

处理	微肥溶液中吸水倍数/(g/g)	3次去离子水中吸水倍数/(g/g)
处理	1	2	3	4
0.2%硫酸锌	74.4	110	287	367
硫酸锌饱和溶液	4.42	8.76	65.9	60.1
0.3%硫酸锰	26.4	39.0	55.2	44.7
硫酸锰饱和溶液	4.83	24.8	225	277
0.2%硫酸铜	60.0	110	115	232
硫酸铜饱和溶液	4.84	75.9	85.1	140
1%硫酸亚铁	11.7	5.70	5.23	10.4
硫酸亚铁饱和溶液	5.98	2.91	3.12	3.36