轮作区水稻根际土壤钙镁离子含量、含水量和酸碱度变化趋势

发布时间：2018-12-14 08:24

【摘要】：为保证水稻品质并避免过度使用钙、镁肥对土壤胶体造成的破坏,利用电感耦合等离子体发射光谱法对陕南水稻—油菜轮作区的不同水稻品系在其不同生长时期的根际土壤中钙、镁含量进行分析。通过研究发现,在轮作区4个采样地(安康市及汉中市的城固县、汉台区、宁强县)不同品种水稻根际土壤钙元素含量都随水稻生长发育过程的进行而逐渐升高(含量范围分别为1 303.5~5 040.5、2 541.1~6 517.3、2 600.0~4 194.7、1 664.0~5 265.8 mg/kg),而镁元素含量随着水稻生长发育过程的进行先升高后降低(含量范围分别为6 101.3~30 021.3、10 382.7~13 738.4、9 956.3~10 490.1、8 583.5~10 140.0 mg/kg)。经分析发现,这些地区的根际土壤中所含的钙、镁元素含量均能满足水稻生长发育需求,不用另外施加肥料。土壤含水量随水稻生长过程逐渐增加,增幅甚至超过50%[安康K优082孕穗期土壤含水量(63.08±2.69)%,城固K优082孕穗期土壤含水量(54.18±2.11)%],符合水稻生长特点。土壤酸碱性测定结果表明,安康地区土壤偏弱酸性(p H值5.5~6.5),城固、汉台地区土壤偏中性(p H值6.5~7.5),宁强地区土壤酸碱性跨度较大(p H值5.5~7.5),但均适合水稻生长。
[Abstract]:In order to ensure the quality of rice and avoid the excessive use of calcium, magnesium fertilizer on the soil colloid damage, The contents of calcium and magnesium in the rhizosphere soil of different rice lines in different growing stages of rice in southern Shaanxi Province were analyzed by inductively coupled plasma emission spectrometry (ICP-AES). Through the research, it is found that in the rotation area of 4 sampling sites (Ankang City and Hanzhong City of Chenggu County, Hantai District, In Ningqiang County, the content of calcium in rhizosphere soil of different rice varieties increased gradually with the development of rice (the content ranges from 1 303.5N 5 040.5N 2 541.1N 6 517.3C 2 600.04 194.7N 1 664.0 to 5 265.8 mg/kg), and the results showed that the content of calcium in the rhizosphere soil of different rice varieties increased gradually with the growth and development of rice. However, the content of magnesium increased at first and then decreased with the growth and development of rice (the range of content was 6 101.3A30 021.3C 10 382.7C 13 738.4 9 956.3n 10 490.1n 8 583.5U 10 140.0 mg/kg). It was found that the contents of Ca and mg in the rhizosphere soil of these areas could meet the needs of rice growth and development without adding fertilizer. Soil water content increased gradually with rice growth, and even increased by more than 50% [(63.08 卤2.69)% in booting stage of Ankang K you 082, (54.18 卤2.11)% in booting stage of Chenggu K you 082], and (54.18 卤2.11)% in booting stage of Chenggu K you 082. It accords with the characteristics of rice growth. The results of soil acid and alkalinity test showed that the weak acid (p H value of soil in Ankang area was 5.56.5), the neutral (p H value of Hantai area was 6.5%, and the soil neutral (p H value of Hantai area was 6.5%. The soil acid-Base span of Ningqiang area is larger than (p H value of 5.5%, but all of them are suitable for rice growth.
【作者单位】：陕西理工大学生物科学与工程学院;陕西理工大学陕西省食药用菌工程技术研究中心;陕西理工大学陕西省资源生物重点实验室;陕西省水稻研究所/汉中市农业科学研究所;
【基金】：陕西省教育厅重点科学研究计划(编号:15JS021) 陕西理工大学人才启动项目(编号:SLGKYQD2-19);陕西理工大学研究生创新基金(编号:SLGYCX1618) 陕西省大学生创新创业训练计划(编号:UIRP15021)
【分类号】：S153

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