摘要
为探究不同种植模式对油莎豆(Cyperus esculentus)饲草离子特性和根系养分含量的影响,采用大田试验进行油莎豆连作与油莎豆—冬小麦轮作,分别在生长前期(S1)、生长中期(S2)和成熟期(S3)测定分析饲草离子特性、根系养分含量和土壤理化性质的变化.结果表明,连作/轮作和不同生育时期对油莎豆根系全磷和全钾含量影响均显著;连作/轮作和不同生育时期的交互作用均对油莎豆饲草离子特性(Cl-、SO42-、Ca2+、K+、Na+和Mg2+)影响显著,对根系全磷、全钾、全氮和粗蛋白含量影响均不显著.在连作/轮作模式下,油莎豆根系的全氮、全磷、全钾和粗蛋白含量随生育时期呈下降趋势.连作模式显著增加了饲草的Cl-、SO42-、K+和Na+含量.轮作模式显著降低了饲草的离子含量(如K+、Na+),而且并未提高油莎豆根系养分含量.因此,连作有利于改善土壤的盐碱化,适合在新疆区域盐碱化土壤大规模推广种植.
Abstract
To explore the effects of different planting patterns on forage grass ion characteristics and nutrients content in root of Cyperus esculentus,a field experiment was carried out under C.esculentus continuous cropping(CC)and C.esculentus-wheat rotation cropping(RC).The changes of ion properties,root nutrient content and soil physicochemical properties of forage were measured and analyzed at early growth stage(S1),middle growth stage(S2),and mature stage(S3).The results showed that CC/RC and different growth stages had signifiicant effects on the total phosphorus and total potassium of the root.Their interaction had significant effects on the forage grass ion characteristics(Cl-,SO42-,Ca2+,K+,Na+and Mg2+),but no significant effects on the contents of total phosphorus,total potassium,total nitrogen and crude protein in the roots.Under CC/RC mode,the total nitrogen,total phosphorus,total potassium,and crude protein of roots were decreased with three growth stages.The CC significantly increased the contents of Cl-,SO42-,K+,and Na+of the forage grass.The RC significantly reduced the content of ions(such as K+and Na+)of forage grass,and did not increase the content of nutrients in roots.Therefore,CC is beneficial to the improvement of soil salinization,which is suitable for large-scale cultivation of salinized soil in Xinjiang.
基金项目
新疆维吾尔自治区重点研发计划(2022B02040-1)
国家重点研发计划(2019YFC0507603)
国家科技期刊平台
NSTL
万方数据