Acta Agriculturae Boreali-Sinica ›› 2023, Vol. 38 ›› Issue (2): 129-138. doi: 10.7668/hbnxb.20193627

Special Issue: Wheat Soil fertilizer Hot Article

• Tillage & Cultivation · Physiology & Biochemistry • Previous Articles     Next Articles

Effects of Different Drip Irrigation and Fertilization Times on Grain Filling Characteristics and Grain Shape of Medium-strength Gluten Wheat

HAO Tianjia, XU Xuexin, XU Yufan, LIU Shuai, JIA Jing, ZHU Zixin, MENG Fangang, ZHAO Changxing   

  1. College of Agronomy,Qingdao Agricultural University,Shandong Province Key Laboratory of Dryland Farming Technology,Qingdao 266109,China
  • Received:2022-11-23 Published:2023-04-28

Abstract:

In order to effectively improve the 1000-grain weight of winter wheat,explore the effect of different drip irrigation and fertilization frequency on grain filling and mature grain shape of medium strong gluten wheat in the Huang-Huai-Hai wheat region,under the field experimental conditions,different winter wheat varieties with medium strong gluten were selected as experimental materials,a comparative experiment was carried out on different drip irrigation fertilization frequency(2,3,4 times,respectively represented by DF2,DF3,DF4)and traditional irrigation fertilization(CK)under 210 kg/ha of total nitrogen application(urea form)and 120 mm of total irrigation.The results showed that there were significant or extremely significant correlations between grain shape(except length and roundness),key grain filling parameters(Vmean,Vmax,V2,M2)and 1000-grain weight through correlation analysis.Drip irrigation increased Vmean (average filling speed),Vmax (maximum filling speed),V2 (grain filling speed in rapid growth period),and M2 (grain accumulation in rapid growth period).Compared with two times of topdressing with water and fertilizer(DF2),after three water and fertilizer applications(DF3),Tmax,Vmean,Vmax,V2,M2,and grain area all increased,and after four water and fertilizer applications(DF4),Tmax,T2,M2 had improved.Compared with DF2,the length,width,thickness,roundness,and grains area increased with the frequency of fertilization(DF3 and DF4),the width and grain area of DF3 reached a significant level,and the thickness of DF4 reached a significant level,reducing the vertical and horizontal.The sieving equivalent of 2.2-2.5 mm was significantly reduced,and the sieving equivalent of >2.8 mm was increased,and the grains were more plump.Compared with border irrigation,the grains of DF3 and DF4 were also more plump.In conclusion,in wheat production,it is very important to increase the frequency of fertilization through drip irrigation to optimize the development of spike grains and improve grain weight.

Key words: Medium-strength gluten wheat, Drip irrigation, Fertilization times, Grain-filling characteristics, Grain shape

Cite this article

HAO Tianjia, XU Xuexin, XU Yufan, LIU Shuai, JIA Jing, ZHU Zixin, MENG Fangang, ZHAO Changxing. Effects of Different Drip Irrigation and Fertilization Times on Grain Filling Characteristics and Grain Shape of Medium-strength Gluten Wheat[J]. Acta Agriculturae Boreali-Sinica, 2023, 38(2): 129-138. doi: 10.7668/hbnxb.20193627.

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