Effects of organic fertilizer application on flag leaf C/N ratio, photosynthetic characteristics and yield of spring wheat with full plastic film mulching

• Published in: Ying yong sheng tai xue bao Vol. 31; no. 11; p. 3749
• Main Authors: Yin, Jia-de, Hou, Hui-Zhi, Zhang, Xu-Cheng, Wang, Hong-Li, Yu, Xian-Feng, Fang, Yan-Jie, Ma, Yi-Fan, Zhang, Guo-Ping, Lei, Kang-Ning
• Format: Journal Article
• Language: Chinese
• Published: China 01.11.2020
• Subjects: Agriculture; Fertilizers; Photosynthesis; Plant Leaves; Plastics; Triticum; flag leaf C/N ratio; soil moisture; full plastic film mulching; photosynthetic characteristics; organic fertilizer
• ISSN: 1001-9332
• DOI: 10.13287/j.1001-9332.202011.029

A field experiment was conducted in the rain-fed semi-arid region of central Gansu in 2016 and 2017, with the treatments 1) hill-drop flat planting with full plastic film mulching (PMS), 2) hill-drop flat planting with full plastic film mulching plus organic fertilizers (PMO), and 3) hill-drop flat planting without soil mulching (CK). We investigated the relations among soil moisture, photosynthetic rate ( ), stomatal conductance ( ) and transpiration rate ( ), C/N ratio, and total nitrogen of flag leaf from the heading stage to the seed-filling stage in different treatments to probe into their effects on the yield and yield components of spring wheat variety 'Longchun 27'. The results showed that organic fertilizer application could increase soil moisture at the middle and late growth stages of spring wheat. PMO increased soil water storage in 0-300 cm depth from the heading stage to the seed filling stage by 4.6% and 8.5%, decreased population canopy temperature by 0.1-1.3 ℃ and 1.4-4.9 ℃, increased net pho