Crops ›› 2020, Vol. 36 ›› Issue (4): 143-149.doi: 10.16035/j.issn.1001-7283.2020.04.020

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Effects of Straw Mulching on Wheat Yield in Different Ecological Regions in Northern Semi-Arid Areas of China Based on Meta Analysis

Fan Yuanyuan1,2(), Wu Haimei1,2, Pang Lei1,2(), Lu Jianlong1,3, Xia Bowen1,2, Yang Xuhai4   

  1. 1Gansu Provincial Key Laboratory of Aridland Crop Science, Lanzhou 730070, Gansu, China
    2Agronomy College, Gansu Agricultural University, Lanzhou 730070, Gansu, China
    3College of Finance and Economics, Gansu Agricultural University, Lanzhou 730070, Gansu, China
    4Animal Husbandry and Veterina Station of Baliwan Township People's Government, Huining County, Baiyin 730716, Gansu, China
  • Received:2019-12-04 Revised:2020-01-15 Online:2020-08-15 Published:2020-08-11
  • Contact: Pang Lei E-mail:fanyuang1@163.com;pangl@gsau.edu.cn

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Abstract:

To understand the effect of straw mulching on wheat yield under different precipitations and accumulated temperature conditions in the northern semi-arid areas of China, the effect of straw mulching and straw mulching on the wheat yield under different precipitations and accumulated temperatures in the northern semi-arid areas of China was quantitatively analyzed by meta analysis. The key words of "semi-arid area", "straw mulching" and "wheat yield" were collected, screened and sorted out the relevant literature published publicly in 1970-2019, and the comprehensive literature database was established. The relationships between wheat yield and straw mulching, different straw mulching, different average annual precipitations and different average annual accumulated temperatures were analyzed. The results showed that straw mulching could increase the yield of wheat in the semi-arid areas of northern China, and the average yield of wheat could be increased by 12.77% by increasing the effective number. When the straw coverage was 6 000-9 000kg/ha, the yield of wheat increased by 14.49% (9.01% to 20.52%, CI > 95%); The yield increase rate of wheat was 19.36% (9.86% to 28.49%, CI > 95%) in the regions with average annual precipitation of 200-400mm; The yield of wheat decreased with the increase of annual accumulated temperature, In the region with average annual accumulated temperature of 0℃-3 000℃, the yield of wheat increased was the highest, 19.56% (16.36% to 22.39%, CI >95%). The results can provide a theoretical basis for the cultivation of wheat by straw mulching technology in different precipitation and accumulated temperature regions of the northern semi-arid areas of China.

Key words: Straw mulching, Meta analysis, Northern semi-arid area, Wheat yield, Three components of output

Fig.1

Analysis of effect value straw mulching on wheat yield and three elements of yield"

Fig.2

Analysis on the effect of straw mulching on wheat yield and yield components 95% confidence interval passes through the zero scale line, the increase effect is significant, otherwise it is not significant, the same below"

Fig.3

Effects of different straw mulching on wheat yield"

Fig.4

Effects of different straw mulching on wheat yield components"

Fig.5

Effects of straw mulching on wheat yield in different precipitation regions"

Fig.6

Effects of straw mulching on elements of wheat yield in different precipitation regions"

Fig.7

Effects of straw mulching on wheat yield at different accumulated temperatures"

Fig.8

Effects of straw mulching on the components of wheat yield at different accumulated temperatures"

Table 1

Correlation of straw mulching, precipitation and accumulated temperature with wheat yield and yield components"

项目Item 产量
Yield		 有效穗数
Effective
spike number		 穗粒数
Grain number
per spike		 千粒重
1000-grain
weight		 秸秆覆盖量
Straw
mulching		 降雨量
Precipitation		 积温
Accumulated
temperature
产量Yield 1
有效穗数Effective spike number 0.809** -1
穗粒数Grain number per spike 0.796** -0.516* 1
千粒重1000-grain weight 0.882** -0.760** 0.525* -1
秸秆覆盖量Straw mulching 0.604* -0.541* 0.512* -0.538* 1
降雨量Precipitation 0.628* -0.565* 0.583* -0.532* 0.008 1
积温Accumulated temperature 0.558* -0.551* 0.506* -0.519* 0.037 0.030 1
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