Acta Agriculturae Boreali-Sinica ›› 2024, Vol. 39 ›› Issue (4): 119-132. doi: 10.7668/hbnxb.20194835

Special Issue: Wheat Hot Article Cultivation & Physiology

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

Effects of Spring Limited Irrigation on Root Development and Grain Yield of Winter Wheat in the Haihe Plain

WANG Li1, LIU Xuejing2, ZHANG Xuecheng1, REN Jianhong1, WANG Yandong1, ZHEN Wenchao1   

  1. 1 College of Agronomy,Hebei Agricultural University,State Key Laboratory of North China Crop Improvement and Regulation,Key Laboratory of North China Water-saving Agriculture, Ministry of Agriculture and Rural Affairs,Baoding 071001,China
    2 College of Mining Engineering, North China University of Science and Technology,Tangshan 063210,China
  • Received:2024-01-15 Published:2024-08-27

Abstract:

Clarifying the effect of spring limited irrigation on the root development and grain yield of winter wheat in Haihe Plain is of great significance to reduce irrigation and improve water use efficiency.This study used Shimai 22 as the test material,irrigation treatments were traditional irrigation twice at jointing and anthesis stage(W2),no irrigation(W0),and single irrigation(W1)with four irrigation-time treatments(3L,4L,5L,and 6L)based on the number of leaves unfolded in spring.The results showed that compared with W2,W0 and W1 yield decreased by 54.6% and 24.4% respectively,the irrigation yield was highest at 4L in W1,and the effect of yield composition reduction was not significant.Limited irrigation reduced the total root weight density and root length density of winter wheat.During the anthesis period, the total root weight density of W1 decreased significantly by 17.2%, while the total root weight density and root length density of W0 decreased significantly by 47.5% and 35.1%, respectively. And under W1 condition, 4L has the highest total root weight density and root length density. The vertical distribution of roots showed that reducing the frequency of irrigation increased the distribution of roots in the soil layer below 40 cm,however,with the postponement of irrigation time,the root distribution of W1 deep soil decreased and root vigor increased.Among them, during the anthesis period, 4L was significantly higher than 6L by 28.8%, 14.2%, and 36.5% in the 120—160 cm, 160—200 cm, and 200—240 cm soil layers, respectively. Correlation and path analysis showed that total root weight density and root length density at joint—anthesis period had a positive effect on yield.The direct contribution of total root length density in 3L and 4L irrigation was the largest.Generally speaking,the root mass of 4L treatment was higher at jointing-anthesis period,the deep root distribution and root activity of 40—240 cm were increased,resulting in higher spike number and kernel number,which was beneficial to alleviate the decrease of winter wheat yield at limited irrigation,it can be used as an effective way of limited irrigation for winter wheat in Haihe Plain.

Key words: Winter wheat, Limited irrigation, Root weight density, Root length density, Root activity

Cite this article

WANG Li, LIU Xuejing, ZHANG Xuecheng, REN Jianhong, WANG Yandong, ZHEN Wenchao. Effects of Spring Limited Irrigation on Root Development and Grain Yield of Winter Wheat in the Haihe Plain[J]. Acta Agriculturae Boreali-Sinica, 2024, 39(4): 119-132. doi: 10.7668/hbnxb.20194835.

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