摘要
[目的]针对砂姜黑土区绿肥恢复和发展存在的问题,研究免耕和翻耕不同耕作方式对苕子生长、养分吸收特性和土壤理化性状的影响,旨在为苕子简化栽培技术提供科学依据。[方法]通过2年定位试验,研究砂姜黑土水旱轮作不同耕作措施对苕子产量、养分吸收量及土壤理化性状的影响。[结果]翻耕利于苕子的生长,促进氮磷钾养分的累积。翻耕处理返青期、现蕾期和开花结荚期2年平均鲜草产量分别较免耕处理增产3.89%、5.34%和4.23%,差异不显著;免耕和翻耕对不同时期苕子养分含量差异较小,但各期对氮、磷、钾的累积吸收量有一定的差异,开花结荚期翻耕处理比免耕处理分别提高10.17%~11.90%、10.84%~16.60%和3.99%~14.05%。翻耕处理的土壤有机质、全氮、碱解氮、速效磷和速效钾含量均高于免耕处理,且存在一定的年际间差异,但不同年份不同处理差异都较小。[结论]在砂姜黑土利用冬闲田免耕栽培苕子是适合大力推广的模式。
[ Objective] Aiming at problems existed in green manure recovery and development in Shajiang black soil region ,the effects of different tillage measures of no tillage and tillage on vetch growth, nutrient uptake characteristics and physical and chemical properties were studied to provide scientific basis for vetch simplified cultivation techniques. [ Method] Through 2 years positioning test, the effects of different tillage measures of Shajiang black soil and paddy upland rotation on vetch yield,nutrient absorption and soil physical and chemical properties were studied. [ Result ] Turn tillage could promote the growth of vetch and the nitrogen, phosphorus and potassium nutrient accumulation. In reviving stage, squaring stage and flowering and fruiting period ,2 years average yield of fresh grass of turn tillage increased by 3.89% ,5.34% and 4.23% compared with no tillage treatment,and the difference wasn＇ t significant. Differences of no tillage and tillage in different periods on nutrient content were smaller, but nitrogen, phosphorus and potassium uptake and accumulation amount was different among the periods. In flowering and fruiting period,they were increased by 10.17% - 11.90% ,10.84% - 16.60% and 3.99% - 14.05% compared with no tillage treatments. Total nitrogen, alkaline hydrolysis nitrogen, available phosphorus and available potassium content of processing treatments were higher than those in no till- age treatment,and there were some interannual differences ,but the differences were small. [ Conclusion] Shajiang black soil in the winter fallow field No tillage cultivation of vetch is the suitable mode which should be vigorously promoted in rice fallow fields of Shajiang black soil.
出处
《安徽农业科学》
CAS
2015年第32期244-247,249,共5页
Journal of Anhui Agricultural Sciences
基金
国家科技支撑计划(2012BAD04B09-2
2011BAD16B06-3
2013BAD07B08)
安徽省农科院学科建设项目(15A1021)
