摘要
为探讨连作和与苦荞(KQ)轮作对云南省3个马铃薯主栽品种根际土壤酶活性、微生物数量和产量的影响,以马铃薯主栽品种'合作88'(HZ88)、'丽薯6号'(LS6H)、'青薯9号'(QS9H)为试验材料,对不同处理下根际土壤的蔗糖酶、蛋白酶、脲酶、纤维素酶活性和微生物数量以及马铃薯产量、品质进行分析.结果表明,KQ-HZ88、KQ-LS6H、KQ-QS9H轮作处理的马铃薯单株产量分别较HZ88-HZ88、LS6H-LS6H、QS9H-QS9H连作处理显著增加76.32%、80.95%、90.91%,还原糖含量显著降低38.71%、18.42%、21.43%.与3年连作相比,HZ88-KQ-HZ88和KQ-HZ88-KQ、LS6H-KQ-LS6H和KQ-LS6H-KQ、QS9H-KQ-QS9H和KQ-QS9H-KQ轮作处理的土壤蔗糖酶活性分别较HZ88-HZ88-HZ88、LS6H-LS6H-LS6H、QS9H-QS9H-QS9H连作处理显著增加8.54%和 14.00%、22.73%和 34.25%、18.13%和 25.12%;细菌数量显著增加 19.05%(P>0.05)和 92.86%、75.68%和72.97%、67.11%和73.21%.土壤酶活性及微生物数量的变化可能是引起云南地区马铃薯连作障碍的重要原因之一,轮作可有效改善根际土壤酶活性,增加土壤中有益菌数量,缓解连作障碍.
Abstract
In order to investigate the effects of continuous cropping and tartary buckwheat(KQ)rotation on rhizosphere soil enzyme activity,microbial quantity and yield of 3 main potato varieties in Yunnan province,the main potato varieties'Hezuo 88'(HZ88),'Lishu 6'(LS6H)and'Qingshu 9'(QS9H)were used as experimental materials.The activities of sucrase,protease,urease,cellulase,microbial quantity in rhizosphere soil and potato yield under different treatments were analyzed.The results showed that,compared with HZ88-HZ88,LS6H-LS6H and QS9H-QS9H treatments,the yields per potato plant of KQ-HZ88,KQ-LS6H and KQ-QS9H rotation treatments were significantly increased by 76.32%,80.95%and 90.91%,respectively,the reducing sugar contents were significantly reduced by 38.71%,18.42%and 21.43%,respectively.Compared with HZ88-HZ88-HZ88,LS6H-LS6H and QS9H-QS9H-QS9H treatments,the soil sucrase activities of HZ88-KQ-HZ88,KQ-HZ88-KQ,LS6H-KQ-LS6H,KQ-LS6H-KQ and QS9H-KQ-QS9H,KQ-QS9H-KQ rotation treatments were significantly increased by 8.54%,14.00%,22.73%,34.25%,18.13%,25.12%,respectively,and the numbers of bacteria were significantly increased by 19.05%(P>0.05),92.86%,75.68%,72.97%,67.11%,73.21%,respectively.The changes of soil enzyme activity and microbial quantity might be one of the important reasons for potato continuous cropping obstacles in Yunnan region.Rotation could effectively improve rhizosphere soil enzyme activity,increase the number of beneficial bacteria in the soil,and alleviate continuous cropping obstacles.
基金项目
国家自然科学基金(31460367)
云南省现代农业产业技术体系建设项目(2020KJTX003)
国家科技期刊平台
NSTL
万方数据