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作者孙国红,王鹏超,徐应明,黄青青,梁学峰,黄荣(2019)在《施用钾肥对稻田土镉污染钝化修复效应影响研究》一文中研究指出:【目的】在Cd污染农田钝化修复中科学、合理施用钾肥。【方法】采用盆栽试验的方法种植水稻,研究了施用不同量氯化钾和硫酸钾对Cd污染稻田土海泡石钝化修复效应的影响。钾肥分别为氯化钾和硫酸钾,试验中施用的氯化钾和硫酸钾分别设置高、中和低3个添加量,钝化剂为海泡石。【结果】海泡石(S)钝化修复可以增加糙米生物量,施用低量(K1L)、中量(K1M)和高量(K1H)KCl后水稻糙米生物量分别降低7.35%、11.47%和4.66%,但与CK相比无显著差异。施用低量硫酸钾(K2L)可使糙米生物量提高2.69%,施用中量硫酸钾(K2M)可使糙米生物量降低1.10%,但与CK无显著性差异,而施用高量硫酸钾(K2H)可使糙米生物量降低14.97%,且与CK差异显著。在Cd污染水稻土钝化修复下,土壤中Cd有效性随KCl施用量的增加而显著增加,与S处理相比增加幅度可达41.67%~58.33%,施用K2SO4同样可以增加土壤中有效态Cd质量分数,增加幅度为16.67%~33.33%,但相比KCl对土壤钝化的活化作用要弱。与S处理相比,SK1L、SK1M和SK1H处理可使糙米Cd质量分数分别增加53.38%、46.15%和200.00%;SK2L、SK2M和SK2H处理可使糙米Cd质量分数分别增加7.69%、38.46%和23.08%。在海泡石钝化修复下,KCl对水稻吸收累积土壤Cd的促进作用比K2SO4显著得多。【结论】在Cd污染水稻土钝化处理下,土壤中Cd有效性随KCl施用量升高而显著增加,施用KCl对水稻糙米Cd吸收累积具有明显的促进作用,特别是在施用高量KCl时,但施用低量K2SO4可以降低水稻根部的Cd累积量,对水稻糙米Cd吸收累积无明显影响,在施用中高量K2SO4时,虽然可以在一定程度上促进水稻根系对土壤中有效态Cd的吸收,但与KCl相比效果低很多。
Abstract
【mu de 】zai Cdwu ran nong tian dun hua xiu fu zhong ke xue 、ge li shi yong jia fei 。【fang fa 】cai yong pen zai shi yan de fang fa chong zhi shui dao ,yan jiu le shi yong bu tong liang lv hua jia he liu suan jia dui Cdwu ran dao tian tu hai pao dan dun hua xiu fu xiao ying de ying xiang 。jia fei fen bie wei lv hua jia he liu suan jia ,shi yan zhong shi yong de lv hua jia he liu suan jia fen bie she zhi gao 、zhong he di 3ge tian jia liang ,dun hua ji wei hai pao dan 。【jie guo 】hai pao dan (S)dun hua xiu fu ke yi zeng jia cao mi sheng wu liang ,shi yong di liang (K1L)、zhong liang (K1M)he gao liang (K1H)KClhou shui dao cao mi sheng wu liang fen bie jiang di 7.35%、11.47%he 4.66%,dan yu CKxiang bi mo xian zhe cha yi 。shi yong di liang liu suan jia (K2L)ke shi cao mi sheng wu liang di gao 2.69%,shi yong zhong liang liu suan jia (K2M)ke shi cao mi sheng wu liang jiang di 1.10%,dan yu CKmo xian zhe xing cha yi ,er shi yong gao liang liu suan jia (K2H)ke shi cao mi sheng wu liang jiang di 14.97%,ju yu CKcha yi xian zhe 。zai Cdwu ran shui dao tu dun hua xiu fu xia ,tu rang zhong Cdyou xiao xing sui KClshi yong liang de zeng jia er xian zhe zeng jia ,yu Schu li xiang bi zeng jia fu du ke da 41.67%~58.33%,shi yong K2SO4tong yang ke yi zeng jia tu rang zhong you xiao tai Cdzhi liang fen shu ,zeng jia fu du wei 16.67%~33.33%,dan xiang bi KCldui tu rang dun hua de huo hua zuo yong yao ruo 。yu Schu li xiang bi ,SK1L、SK1Mhe SK1Hchu li ke shi cao mi Cdzhi liang fen shu fen bie zeng jia 53.38%、46.15%he 200.00%;SK2L、SK2Mhe SK2Hchu li ke shi cao mi Cdzhi liang fen shu fen bie zeng jia 7.69%、38.46%he 23.08%。zai hai pao dan dun hua xiu fu xia ,KCldui shui dao xi shou lei ji tu rang Cdde cu jin zuo yong bi K2SO4xian zhe de duo 。【jie lun 】zai Cdwu ran shui dao tu dun hua chu li xia ,tu rang zhong Cdyou xiao xing sui KClshi yong liang sheng gao er xian zhe zeng jia ,shi yong KCldui shui dao cao mi Cdxi shou lei ji ju you ming xian de cu jin zuo yong ,te bie shi zai shi yong gao liang KClshi ,dan shi yong di liang K2SO4ke yi jiang di shui dao gen bu de Cdlei ji liang ,dui shui dao cao mi Cdxi shou lei ji mo ming xian ying xiang ,zai shi yong zhong gao liang K2SO4shi ,sui ran ke yi zai yi ding cheng du shang cu jin shui dao gen ji dui tu rang zhong you xiao tai Cdde xi shou ,dan yu KClxiang bi xiao guo di hen duo 。
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论文作者分别是来自灌溉排水学报的孙国红,王鹏超,徐应明,黄青青,梁学峰,黄荣,发表于刊物灌溉排水学报2019年05期论文,是一篇关于污染论文,土壤论文,海泡石论文,钝化修复论文,钾肥论文,水稻论文,灌溉排水学报2019年05期论文的文章。本文可供学术参考使用,各位学者可以免费参考阅读下载,文章观点不代表本站观点,资料来自灌溉排水学报2019年05期论文网站,若本站收录的文献无意侵犯了您的著作版权,请联系我们删除。