دورية أكاديمية

Approach to Higher Wheat Yield in the Huang-Huai Plain: Improving Post-anthesis Productivity to Increase Harvest Index

التفاصيل البيبلوغرافية
العنوان: Approach to Higher Wheat Yield in the Huang-Huai Plain: Improving Post-anthesis Productivity to Increase Harvest Index
المؤلفون: Jianzhao Duan, Yapeng Wu, Yi Zhou, Xingxu Ren, Yunhui Shao, Wei Feng, Yunji Zhu, Li He, Tiancai Guo
المصدر: Frontiers in Plant Science, Vol 9 (2018)
بيانات النشر: Frontiers Media S.A., 2018.
سنة النشر: 2018
المجموعة: LCC:Plant culture
مصطلحات موضوعية: winter wheat, increased yield, harvest index, dry matter, leaf area index, radiation interception, Plant culture, SB1-1110
الوصف: Both increased harvest index (HI) and increased dry matter (DM) are beneficial to yield; however, little is known about the priority of each under different yield levels. This paper aims to determine whether HI or DM is more important and identify the physiological attributes that act as indicators of increased yield. Two field experiments involving different cultivation patterns and water-nitrogen modes, respectively, were carried out from 2013 to 2016 in Huang-Huai Plain, China. Plant DM, leaf area index (LAI), and radiation interception (RI) were measured. Increased yield under low yield levels 7500 kg ha-1 were largely dependent on an increase in HI. Under high yield levels, HI showed a significant negative correlation with total DM and a parabolic relationship with net accumulation of DM during filling. Higher net accumulation of DM during filling helped slow down the decrease in HI, thereby maintaining a high value. Moreover, net DM accumulation during filling was positively correlated with yield, while post-anthesis accumulation showed a significant linear relationship with leaf area potential (LAP, R2 = 0.404–0.526) and radiation interception potential (RIP, R2 = 0.452–0.576) during grain filling. These findings suggest that the increase in LAP and RIP caused an increase in net DM accumulation after anthesis. Under DM levels >13,000 kg ha-1 at anthesis, maintaining higher LAI and RI in lower layers during grain formation contributed to higher yield. Furthermore, the ratio of upper- to lower-layer RI showed a second-order curve with yield during filling, with an increase in the optimal range with grain development. Pre-anthesis translocation amount, translocation ratios and contribution ratios also showed second-order curves under high yield levels, with optimal values of 3000–4500 kg ha-1, 25–35, and 30–50%, respectively. These results confirm the importance of HI in improving the yield, thereby providing a theoretical basis for wheat production in the Huang-Huai Plain.
نوع الوثيقة: article
وصف الملف: electronic resource
اللغة: English
تدمد: 1664-462X
Relation: https://www.frontiersin.org/article/10.3389/fpls.2018.01457/full; https://doaj.org/toc/1664-462X
DOI: 10.3389/fpls.2018.01457
URL الوصول: https://doaj.org/article/2a61db584c7e46b5b056f502581c9912
رقم الأكسشن: edsdoj.2a61db584c7e46b5b056f502581c9912
قاعدة البيانات: Directory of Open Access Journals
الوصف
تدمد:1664462X
DOI:10.3389/fpls.2018.01457