吴宇佳+张冬明+曾建华+潘孝忠+雷菲+谢良商

摘要：研究连续施用土壤改良剂对水稻、四季豆产量及土壤理化性质的影响。结果表明，在水稻-四季豆轮作过程中，施用土壤改良剂均能明显增加水稻和四季豆的产量，并且能增加水稻子粒的千粒重。水稻季施用土壤改良剂，在四季豆季也有一定的增产，表明适当用量的土壤改良剂有明显后效；连续施用土壤改良剂比单季施用的作物产量更高，土壤pH升高更快，土壤交换性钙、交换性镁得到更快提升。

关键词：土壤改良剂；水稻-四季豆轮作；土壤理化性质

中图分类号：S156.2 文献标识码：A 文章编号：0439-8114（2017）14-2635-04

DOI：10.14088/j.cnki.issn0439-8114.2017.14.009

Abstract： The effects of soil amendment to yield of rice and kidney bean， physical and chemical properties of soil were studied in rice-kidney bean rotation system. The results showed that in the rice-kidney bean rotation， compared with the controls， the application of soil amendment had increased the yield of rice and kidney bean， and also increased the thousand grain weight of rice. Application of amendment in rice season， it also had a certain amount of yield in rice-kidney season showed that proper dosage of amendment had great after-effect； But compared with application of amendment both in rice and rice-kidney season， continuous application of amendment had a higher yield of crops. Compared with the controls， the application of amendments had increased the soil pH to varying degrees. The application of amendment both in rice and kidney bean could increase the soil pH， exchangeable calcium content and exchangeable magnesium content larger than the single season.

Key words： soil amendment； rice-kidney bean rotation； physical and chemical properties of the soil

海南省耕地土壤酸性強、有机质含量低、化肥施用不合理且利用率低的问题严重制约了水稻和冬季瓜菜的可持续发展，修复改良土壤、提高肥料利用率、获得优质高效农产品迫在眉睫。本试验是在水稻单季施用土壤改良剂的基础上继续进行水稻、四季豆连续施用土壤改良剂的研究。旨在分析土壤改良剂对水稻和四季豆连续施用土壤改良的效果和对作物产量的影响。

1 材料与方法

1.1 材料

试验点设在屯昌县枫木镇枫木洋，供试土壤pH 5.06，有机质15.2 g/kg，碱解氮、有效磷、速效钾、交换性钙、交换性镁分别为156.2、72.6、147.3、890.3、91.9 mg/kg。土壤改良剂品种为北京泰中兴农科技发展有限公司产品。

1.2 试验设计及操作

供试作物为水稻和四季豆，均为当地品种，试验设水稻—四季豆季连续施用土壤改良剂和水稻季单季施用土壤改良剂两种方案，水稻季设两个处理，处理1，改良剂用量为30 kg/667 m2；……