DOI: 10.57760/sciencedb.03055
title: Spatial-Temporal Distribution Characteristic and Interaction Between Agronomic Traits of Winter Wheat and Precipitation of Growth Period in Huang-Huai Dryland
title: 黄淮旱地冬小麦农艺性状与生育期降水时空分布特征与互作关系研究

description: 【Objective】This article was to study the spatial-temporal distribution and interaction between agronomic traits of winter wheat and precipitation of growth period, and to provide a theoretical basis for variety improvement of winter wheat in Huang-Huai dryland under climate change.【Method】The data of agronomic traits and precipitation of the national regional trials of Huang-Huai dryland from 2010 to 2017 were used to analyze the spatial-temporal distribution and interaction by geographic methods and statistical methods.【Result】In terms of spatial distribution, the actual yield per unit area and 1000-kernel weight of winter wheat showed an increasing trend from west barren dryland to east fertile dryland. The plant height showed higher in the west barren dryland and lower in the middle and east fertile dryland. The total precipitation of different growth stages in the north of central and eastern Huang-Huai dryland was generally low, the south of central and eastern Huang-Huai dryland relatively high. In terms of time change, the total precipitation of germination to maturity period in the central and western dryland of Henan, Shanxi and Shaanxi showed a significant increasing trend. The total precipitation of germination to heading period was significantly positively correlated with actual yield, plant height, and number of effective ears. The results of path analysis showed that the plant height and the number of effective ears determined 53.2% of the actual yield variation in Huang-Huai fertile dryland, and the plant height and 1000-kernel weight determined 67% of the actual yield variation in Huang-Huai barren dryland. 【Conclusion】 It was suggested that winter wheat breeding in Huang-Huai fertile dryland should increase plant height appropriately, improve the ability of efficient use of limited precipitation before flowering and increase ear development. Huang-Huai barren dryland breeding should stabilize plant height and improve the efficiency of transporting dry matter after flowering and harvest index. 
description: 【Objective】This article was to study the spatial-temporal distribution and interaction between agronomic traits of winter wheat and precipitation of growth period, and to provide a theoretical basis for variety improvement of winter wheat in Huang-Huai dryland under climate change.【Method】The data of agronomic traits and precipitation of the national regional trials of Huang-Huai dryland from 2010 to 2017 were used to analyze the spatial-temporal distribution and interaction by geographic methods and statistical methods.【Result】In terms of spatial distribution, the actual yield per unit area and 1000-kernel weight of winter wheat showed an increasing trend from west barren dryland to east fertile dryland. The plant height showed higher in the west barren dryland and lower in the middle and east fertile dryland. The total precipitation of different growth stages in the north of central and eastern Huang-Huai dryland was generally low, the south of central and eastern Huang-Huai dryland relatively high. In terms of time change, the total precipitation of germination to maturity period in the central and western dryland of Henan, Shanxi and Shaanxi showed a significant increasing trend. The total precipitation of germination to heading period was significantly positively correlated with actual yield, plant height, and number of effective ears. The results of path analysis showed that the plant height and the number of effective ears determined 53.2% of the actual yield variation in Huang-Huai fertile dryland, and the plant height and 1000-kernel weight determined 67% of the actual yield variation in Huang-Huai barren dryland. 【Conclusion】 It was suggested that winter wheat breeding in Huang-Huai fertile dryland should increase plant height appropriately, improve the ability of efficient use of limited precipitation before flowering and increase ear development. Huang-Huai barren dryland breeding should stabilize plant height and improve the efficiency of transporting dry matter after flowering and harvest index.