湖南农业科学Issue(4)：25-30,6.DOI:10.16498/j.cnki.hnnykx.2025.004.006
减氮条件下蚯蚓与紫云英共生对早稻生物学特性及产量的影响
Symbiosis of Earthworm and Chinese Milk Vetch Influences Biological Characteristics and the Yield of Early Rice Under Nitrogen Reduction Conditions
摘要
Abstract
This study aims to explore the fertilization reduction and efficiency improvement potential of the Chinese milk vetch-double cropping rice system.Six treatments were designed,including T1(winter fallow+conventional fertilizer application),T2(Chinese milk vetch+conventional fertilizer application),T3(Chinese milk vetch+20%nitrogen reduction),T4(Chinese milk vetch+20%nitrogen reduction+10 earthworms),T5(Chinese milk vetch+40%nitrogen reduction),and T6(Chinese milk vetch+40%nitrogen reduction+10 earthworms).The effects of symbiosis between earthworms and Chinese milk vetch on photosynthetic characteristics,dry matter accumulation,and yield of early rice under nitrogen reduction conditions were investigated.The results are described as follows.(1)Compared with T1,T2-T6 with Chinese milk vetch increased the SPAD value.Under the condition of planting Chinese milk vetch,the SPAD values of rice at all stages decreased with the increase in the nitrogen reduction ratio.The SPAD values at different stages in T4 had no significant difference from those in T2.(2)The net photosynthetic rate,stomatal conductance,and transpiration rate of rice followed the trend of T2>T4>T3>T6>T1>T5,and the photosynthetic parameters had no significant difference between T4 and T2.(3)T4 had the highest dry matter weight of panicles,dry matter weight of plants,and stem sheath material output and output rate of rice at the maturity stage,which were 9.06 t/hm2,14.53 t/hm2,1.26 t/hm2,and 26.24%,respectively.The rice yield had no significant difference between T4 and T2.Therefore,the symbiosis between earthworms and Chinese milk vetch under 20%nitrogen reduction can enhance the photosynthetic characteristics of early rice leaves and promote the material transfer from stem sheath to grains,thereby reducing the risk of yield reduction caused by nitrogen reduction.关键词
减氮/蚯蚓/紫云英/光合特性/水稻产量/共生Key words
nitrogen reduction/earthworms/Chinese milk vetch/photosynthetic characteristics/rice yield/symbiosis分类
农业科技引用本文复制引用
李海容,郭勇,程凯凯,文丽,汪柯,唐海明,易镇邪,李超..减氮条件下蚯蚓与紫云英共生对早稻生物学特性及产量的影响[J].湖南农业科学,2025,(4):25-30,6.基金项目
湖南省农业科技创新项目(2024CX128) （2024CX128）
