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Dry matter and nutrient partitioning changes for the past 30 years of cotton production
Agronomy Journal ( IF 2.0 ) Pub Date : 2020-07-28 , DOI: 10.1002/agj2.20386
Irish Lorraine B. Pabuayon 1 , Katie L. Lewis 1, 2 , Glen L. Ritchie 1
Affiliation  

Modern cotton (Gossypium hirsutum L.) cultivars are more productive and have unique growth and fruiting characteristics due to optimization of genetics and management practices in the past 30 yr. The most recent work evaluating nutrient uptake and partitioning by cotton was conducted in the early 1990s, necessitating a re‐evaluation of nutrient accumulation and requirements in modern high productivity cultivars. Modern cultivar (FiberMax [FM] 958 and Deltapine [DP] 1646) resource allocation, including dry matter production, yields, and accumulation and partitioning of N, P, K, Ca, Mg, and S to different organs, was compared with that of a 1990s cultivar (Paymaster [PM] HS26) in 2018 and 2019. The modern cultivars tested in this study partitioned a greater percentage of dry matter, N, P, K, and S into the fruit than the older cultivar, highlighting the importance of partitioning for increased production potential of these cultivars from the 1990s to the 2010s. Greater efficiencies in partitioning and remobilization of N, P, K, and S resulted in 66, 88, 64, and 30% increase in the amount of lint yield produced for every unit of uptake, respectively, under favorable growing conditions. These findings suggest that existing fertility paradigm in cotton may underestimate the accumulation expectations during the middle and latter part of the growing season. These results can be a basis for optimizing nutrient application to address partitioning changes. Adjusting nutrient recommendations to the shift in cultivar growth characteristics may improve both yield and application efficiency of fertilizers.

中文翻译:

过去30年棉花生产中干物质和养分分配的变化

现代棉花(陆地棉)L.)品种由于过去30年来遗传学和管理方法的优化,具有更高的产量和独特的生长和结实特性。1990年代初进行了最新的评估棉花对养分吸收和分配的工作,这需要对现代高产栽培品种的养分积累和需求进行重新评估。比较了现代品种(FiberMax [FM] 958和Deltapine [DP] 1646)的资源分配,包括干物质生产,产量以及N,P,K,Ca,Mg和S在不同器官中的积累和分配。是在2018年和2019年收获的1990年代品种(Paymaster [PM] HS26)。在本研究中测试的现代品种比老品种将更多的干物质N,P,K和S分配到果实中,强调了从1990年代到2010年代进行分区以提高这些品种的生产潜力的重要性。N,P,K和S的分配和迁移效率提高,在有利的生长条件下,每单位摄取的皮棉产量分别增加66%,88%,64%和30%。这些发现表明,棉花现有的生育范式可能低估了生长期中期和后期的积累预期。这些结果可以作为优化营养素应用以解决分配变化的基础。调整养分建议以适应品种生长特性的变化可能会提高肥料的产量和施用效率。N,P,K和S的分配和迁移效率提高,在有利的生长条件下,每单位摄取的皮棉产量分别增加66%,88%,64%和30%。这些发现表明,棉花现有的生育范式可能低估了生长期中期和后期的积累预期。这些结果可以作为优化营养素应用以解决分配变化的基础。调整养分建议以适应品种生长特性的变化可能会提高肥料的产量和施用效率。N,P,K和S的分配和迁移效率提高,在有利的生长条件下,每单位摄取的皮棉产量分别增加66%,88%,64%和30%。这些发现表明,棉花现有的生育范式可能低估了生长期中期和后期的积累预期。这些结果可以作为优化营养素应用以解决分配变化的基础。调整养分建议以适应品种生长特性的变化可能会提高肥料的产量和施用效率。在有利的生长条件下。这些发现表明,棉花现有的生育范式可能低估了生长期中期和后期的积累预期。这些结果可以作为优化营养素应用以解决分配变化的基础。调整养分建议以适应品种生长特性的变化可能会提高肥料的产量和施用效率。在有利的生长条件下。这些发现表明,棉花现有的生育范式可能低估了生长期中期和后期的积累预期。这些结果可以作为优化营养素应用以解决分配变化的基础。调整养分建议以适应品种生长特性的变化可能会提高肥料的产量和施用效率。
更新日期:2020-07-28
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