[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"item-2126":3},{"id":4,"title":5,"url":6,"summary":7,"summary_zh":8,"content":9,"source_name":10,"source_url":6,"published_at":11,"category":12,"cover_url":9,"hotness":13,"is_selected":14,"score":15,"score_detail":16,"sources":23,"tags":25,"view_count":31,"doi":32,"paper":33,"created_at":59},2126,"Reduced potassium fertilization combined with magnesium application improves rice population quality and regulates grain yield and quality","https:\u002F\u002Fdoi.org\u002F10.3389\u002Ffsufs.2026.1921807","Inroduction Sichuan is a major hybrid rice-producing region, where paddy soils commonly suffer from acidification and severe magnesium leaching, resulting in low available-Mg status. Excessive potassium application intensifies K-Mg absorption antagonism and exacerbates magnesium deficiency, while blind potassium reduction accelerates plant senescence and impairs rice yield and quality. Although magnesium participates in photosynthesis and assimilate translocation, little is known about the combined effects of reduced potassium fertilization and magnesium supplementation on rice growth and agronomic performance. Methods A two-year field experiment was conducted to examine rice yield, grain quality, and nutrient uptake under varying potassium-magnesium combinations, aiming to provide fertilization references for green rice production in Sichuan hilly regions. A two-factor split-plot design was employed, with three potassium rates (0, 120, and 180 kg\u002F ha, denoted K0, K1, and K2) as main plots and three magnesium rates (0, 30, and 60 kg\u002Fha, denoted M0, M1, and M2) as sub-plots. Leaf area index, dry matter accumulation, chlorophyll content, yield components, and grain quality traits were assessed in this study. Results The results showed that the K1 treatment significantly improved grain yield, with relatively better comprehensive performance observed under the K1M2 combination. Averaged across 2 years, K1 increased grain yield by 26.55% relative to K0 and exhibited comparable yield to K2. Under K1, the M2 treatment further increased yield by 6.21% relative to M1. Moreover, K1M2 significantly enhanced leaf area index and chlorophyll content, while improving milling and appearance quality and reducing grain chalkiness and amylose content. Discussion These findings offer a theoretical and practical basis for improving rice yield and grain quality and promoting green, high-quality and efficient rice cultivation in the hilly regions of Sichuan.","引言 四川是杂交水稻主产区，稻田土壤普遍存在酸化与镁素淋溶严重的问题，导致土壤有效镁含量偏低。过量施钾会加剧钾镁吸收拮抗，加重镁素缺乏，而盲目减钾则会加速植株衰老，损害水稻产量与品质。尽管镁参与光合作用与同化物转运，但关于减钾配施镁对水稻生长及农艺性状的联合效应尚不清楚。方法 通过两年田间试验，研究不同钾镁配施组合下水稻产量、稻米品质及养分吸收特征，旨在为四川丘陵区水稻绿色生产提供施肥参考。采用两因素裂区设计，以3个钾水平（0、120、180 kg\u002Fha，记为K0、K1、K2）为主区，3个镁水平（0、30、60 kg\u002Fha，记为M0、M1、M2）为裂区。本研究测定了叶面积指数、干物质积累量、叶绿素含量、产量构成因素及稻米品质性状。结果 结果表明，K1处理显著提高籽粒产量，其中K1M2组合综合表现相对较优。两年平均而言，K1较K0使籽粒产量提高26.55%，且产量与K2相当。在K1条件下，M2处理较M1进一步增产6.21%。此外，K1M2显著提高叶面积指数与叶绿素含量，同时改善碾磨品质与外观品质，降低籽粒垩白度与直链淀粉含量。讨论 这些研究结果为提高水稻产量与稻米品质、促进四川丘陵区水稻绿色优质高效栽培提供了理论与实践依据。",null,"Frontiers in Sustainable Food Systems","2026-09-11T00:00:00Z","论文",10,false,76,{"impact":17,"substance":18,"depth":19,"authority":20,"freshness":13,"relevant":21,"comment":22},15,21,17,13,1,"两年田间试验数据扎实，为四川丘陵区水稻减钾配镁施肥提供实证参考，但属区域性栽培技术研究，产业影响有限。",[24],{"name":10,"url":6},[26,27,28,29,30],"水稻","科学施肥","绿色种植","钾镁配施","四川丘陵",0,"10.3389\u002Ffsufs.2026.1921807",{"doi":32,"openalex_id":34,"authors":35,"venue":10,"cited_by_count":31,"oa_url":6,"card":52,"direction":56,"ingested_from":58},"W7212147499",[36,38,40,42,44,46,48,50],{"name":37,"orcid":9},"Jianming Ding",{"name":39,"orcid":9},"Xiaotian Jiang",{"name":41,"orcid":9},"Ran Wang",{"name":43,"orcid":9},"Keyuan Zhang",{"name":45,"orcid":9},"Lubing Jia",{"name":47,"orcid":9},"Yuetong Mo",{"name":49,"orcid":9},"Rongping Zhang",{"name":51,"orcid":9},"Peng Ma",{"tldr":53,"method":54,"finding":55,"direction":56,"opportunity":57},"研究减钾配施镁对四川丘陵水稻产量和品质的影响。","两年田间裂区试验，设3个钾水平和3个镁水平。","减钾至120 kg\u002Fha配施60 kg\u002Fha镁可增产并改善稻米品质。","农业绿色发展与碳","可探究减钾配镁下土壤-植株镁钾互作机制及适宜区域阈值。","openalex","2026-09-11T23:30:07.632874Z"]