摘要
通过盆栽试验,研究了钙镁磷肥与氨基酸叶面肥混施共5种不同调控处理对酸性富硒土壤有效硒、水稻各部位硒含量以及其籽粒有机硒含量的调控效果。试验共分为6个处理:(1)CK,常规钙镁磷肥用量,0.2 g/kg;(2)P_1,单施低量钙镁磷肥,0.4 g/kg;(3)P_2,单施高量钙镁磷肥,0.6 g/kg;(4)B,单施氨基酸叶面肥,1 500 ml/hm^2;(5)P_1+B,单施低量钙镁磷肥并配施氨基酸叶面肥,0.4 g/kg+1 500 ml/hm^2;(6)P_2+B,单施高量钙镁磷肥并配施氨基酸叶面肥,0.6 g/kg+1 500 ml/hm^2。结果表明:在无外源硒素添加的前提下,不同调控措施均能有效提高酸性富硒土壤中硒的有效性。高用量的2个处理(P_2,P_2+B)对提高土壤硒有效性的效果最佳,分别使土壤有效硒的含量提高了43.54μg/kg和42.16μg/kg,使水稻籽粒有机硒含量分别相应提高了39.27μg/kg和28.65μg/kg,5种处理的增幅均达到了极显著水平(P_<0.01)。
A pot experiment was carried out to investigate the effects of 5 different treatments of mixed application of calcium magnesium phosphate and aminoacid foliar fertilizer on Se availability in acid Se-rich soil, Se contents in different rice organs, and organic Se in rice grains. 6 treatments were designed： 1）CK,conventional calcium magnesium phosphate, 0.2 g/kg; 2） P1, single low calcium magnesium phosphate, 0.4 g/kg; 3） P2, single high calcium magnesium phosphate, 0.6 g/kg; 4）B, single aminoacid foliar fertilizer; 1 500 ml/hm^2; 5） P1＋B; 6） P2＋B. The results showed that all treatments increased significantly soil Se availability and organic Se contents in rice grains compared with CK （P 〈0.01）, the effects of P2 and P2＋B treatments were best, which increased available Se contents by 42.16 μg/kg and 43.54 μg/kg, respectively, increased organic Se contents in rice grains by 28.65 μg/kg and 39.27 μg/kg, respectively.
作者
马迅
诸旭东
宗良纲
方勇
胡秋辉
MA Xun;ZHU Xudong;ZONG Lianggang;FANG Yong;HU Qiuhui(College of Resources and Environmental Science, Nanjing Agricultural University, Nanjing 210095, China;Institute of Food Science and Engineering, Nanjing University of Finance and Economics, Nanjing 210046, China)
出处
《土壤》
CAS
CSCD
北大核心
2018年第2期284-290,共7页
Soils
基金
农业部公益性行业项目(201303106)资助
关键词
钙镁磷肥
氨基酸叶面肥
混施
硒
酸性富硒土壤
水稻
Calcium magnesium phosphate
Aminoacid foliar fertilizer
Mixed application
Se
Acidic Se-rich soil
Rice
