山西农业大学学报（自然科学版）2024，Vol.44Issue(1)：89-100,12.DOI:10.13842/j.cnki.issn1671-8151.202304007
滨海复垦土地不同间混作模式增产及改良效应
Enhanced crop yield and improvement effects of different intercropping patterns on reclaimed coastal land
摘要
Abstract
[Objective]The study aimed to investigate the impacts of different planting patterns involving sorghum and wild soy-bean on crop yield and land improvement in reclaimed coastal areas previously abandoned as salt pans.The objective was to un-derstand the mechanisms by which different planting patterns enhance productivity in reclaimed land and to discuss the primary environmental factors influencing changes in the bacterial community within the sorghum rhizosphere soil.This research aimed to provide a foundation for optimizing planting strategies in reclaimed coastal salt pans and integrating cultivation practices with land use.[Methods]A plot positioning experiment was conducted in reclaimed coastal salt pans areas.Five treatments were im-plemented,including sorghum monocropping(S),wild soybean monocropping(WS),intercropping with one row of sorghum and one row of wild soybean(S1WS1),intercropping with one row of sorghum and two rows of wild soybean(S1WS2),and co-sowing of sorghum and wild soybean(SWS).Sorghum biomass,yield,and rhizosphere soil were selected as the research objects.High throughput sequencing technology was used to analyze bacterial community variations in the rhizosphere soil un-der different planting patterns,followed by redundancy analysis of bacterial community structure and soil environmental factors.[Results]Compared to sorghum monoculture(S),the yield increase rates for sorghum-wild soybean intercropping patterns of S1WS1,S1WS2 and SWS were 10.16%,13.15%,and 40.68%,respectively.Crop yield increases were significantly posi-tively correlated with soil nitrate nitrogen and alkaline phosphatase,with a land equivalent ratio greater than 1,highlighting the benefits of intercropping.S1WS1,S1WS2,and SWS models improved soil organic matter,nitrogen,phosphorus nutrient content,and enzyme activity.Results indicated that the SWS model demonstrated the most significant soil improvement effect by reducing soil pH and salt content.The S1WS2 and SWS models enhanced soil bacterial diversity,with the SWS model ex-hibiting the highest bacterial diversity index that ACE,Chao,and Shannon indices being 1.12,1.12 and 1.04 times higher than the S model,respectively.The bacterial diversity index showed a significant positive correlation with soil nitrate nitrogen and urease.Actinomycetes,Proteus,and Curvularia were abundant.Soil nitrate nitrogen,alkaline phosphatase,and N/P ra-tio were the primary environmental factors influencing the bacterial community structure.S1WS1,S1WS2,and SWS all con-tributed to improving crop yield,land equivalent ratio,soil organic matter,nitrogen,phosphorus content,and enzyme activity.[Conclusion]In this experiment,compared to other models,the SWS model exhibited the highest crop yield increase rate and land equivalent ratio,demonstrating the most advantageous intercropping benefits.Additionally,it presented the highest soil organic matter and nitrogen-phosphorus content,thus showcasing the most substantial soil improvement effect.关键词
种植模式/种间相互作用/作物增产/土壤改良/高通量测序Key words
Planting pattern/Interspecific interaction/Crop yield increase/Soil improvement/High throughput sequencing分类
农业科技引用本文复制引用
朱奕豪,李际峰,董晓亮,王松涛,刘志全,吴振,陈为峰..滨海复垦土地不同间混作模式增产及改良效应[J].山西农业大学学报（自然科学版）,2024,44(1):89-100,12.基金项目
山东省重大科技创新工程项目(2021CXGC010704) （2021CXGC010704）
山东省地矿局海岸带地质环境保护重点实验室2021年度开放基金项目(SYS202102) （SYS202102）
山东省自然资源厅项目:国土空间规划编制及实施(农业空间格局优化及管控研究) （农业空间格局优化及管控研究）
