不同栽培方式对水稻SPAD值、剑叶叶面积及干物质生产的影响
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中图分类号：S511；S352.5 文献标识码：A 文章编号：1002-204X（2025）08-0026-05
doi：10.3969/j.issn.1002-204x.2025.08.005
Abstract To explore theacumulationof drymaterunder direct seedingcultivation of ricein Ningxia，five rice varieties that have been widely promoted in Ningxia wereusedas experimental materials，and transplanting was adoptedas thecontrol cultivation method.Astudy wasconductedontheeffects of two direct seedingcultivation methods，namely moisture-saving dry direct seding and post-sowing watering，on the SPAD value，sword leaf area， accumulationanddistributionofdrymater，andyieldcompositionofrice.Theresultsshowthattheefectsof different cultivation methods on the SPADand sword leaf area，drymater accumulationanddistribution，and yield composition of rice arereal.Among them，the SPAD values of the two direct seding cultivationmethods did notshow significant differences at the jointing stage and heading stage.With theadvancement of the growth process，theyreached a significantlydiferentlevelatthe maturitystage.Theleaf area ofsword leaf reached significantlydiffrentlevels at the jointing stage，heading stageand maturitystage，andtheleaf area of swordleaf was significantlylargerthan hatof moisture-retaining drydirect seding under the conditionof watering after sowing.Thedry matervaried greatlyfrom the jointing stage to the maturity stage.Thedry materof the twodirectseding cultivation methods showed significant differences at the jointing stage，heading stageand maturitystage.Compared with the transplanting cultivation method， thetwo direct seeding cultivationmethods showed significant diferences in the number of paniclesand1Oo0-grain weight.However，in termsof grain yield and harvest index，there was no significant diffrence inpost-sowing watering， but significant diferences were shown in moisture-retaining dry direct seeding.To sum up，direct seeding with water after sowing is significantlysuperior tomoisture-retaining dryseeding in termsof dry matteraccumulationandyield composition.Moreover，compared with transplanting，there is no significant diferencein thenumberof grains perear and grainyield between directseeding with wateraftersowing and transplanting，which fullconfirmsthat the yieldof direct seeding is not necessarily worse than that of transplanting.
Key Words Moisture-retaining dry direct seeding Water after sowing; SPAD value; Dry mater accumulation
水稻为一年生禾本科单子叶植物，须根系，不定根发达，圆锥花絮，自花授粉，原产于中国，是世界主要粮食作物之一，超过 50% 的人口以水稻为主食。（剩余6967字）
