轮作制度及稻草还田对烤烟生长及土壤理化性状的影响

Effects of Rotation System and Rice Straw Returning to Field on Tobacco Flue-cured Growth and Soil Physical and Chemical Properties

为明确泰宁县前茬作物及稻草还田对植烟土壤物理性状以及氯素含量的影响,开展了轮作制度及稻草还田对烤烟生长及土壤理化性状的影响试验。结果表明:各处理植烟土壤含水量在10.33%~16.87%之间,土壤容重为0.81~0.95 g/cm3,土壤氯离子含量偏低,但与土壤pH值成负相关关系,当土壤氯离子含量较高时,可能会降低烟叶的产量与质量;烟田不进行稻草还田和制种会提高氯和全钾含量,但会降低水解性氮、有效磷和有机质含量;烟田进行稻草还田和制种会提高土壤水分,但会降低土壤容重;烟田不进行稻草还田但进行制种会提高土壤水解性氮、有效磷和有机质含量。

In order to clarify the effects of previous crops and rice straw returning to the field on physical and chemical properties and chloride content of tobacco-growing soil,the test of effects of rotation system and rice straw returning to field on tobacco growth and soil physical and chemical properties was conducted.The results showed that the moisture content of tobacco-growing soil in each treatment was between 10.33%and 16.87%,the soil bulk density was between 0.81 g/cm3 and 0.95 g/cm3.The soil chlorine content was low,but it was negatively related to pH value.When the soil chlorine content was high,the yield and quality of tobacco might reduce.No rice straw returning to field and no seed production in the tobacco fields will increase soil chlorine and total potassium contents,but decrease the contents of hydrolyzable nitrogen,available phosphorus and organic matter in soil.The rice straw returning to field and seed production in the tobacco fields will increase soil moisture,but decrease soil bulk density.No rice straw returning to field but conducting seed production in the tobacco fields will increase contents of hydrolyzable nitrogen,available phosphorus and organic matter in soil.