从正常播种期改为早播或晚播是否会带来产量效益?全球荟萃分析

IF 5.6 1区 农林科学 Q1 AGRONOMY Field Crops Research Pub Date : 2024-09-28 DOI:10.1016/j.fcr.2024.109600
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引用次数: 0

摘要

有人提出,改变播种日期是一种简单的农艺手段,可以提高作物的成活率、生长速度和产量,这也是一种适应气候变化的策略。
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Does shifting from normal to early or late sowing dates provide yield benefits? A global meta-analysis

Context

Shifting the sowing date has been proposed as a simple agronomic lever to enhance crop establishment, growth, and yield, which could be a climate change adaptation strategy.

Objective or research question

Previous research showed that the experimental data assessing the effect of sowing date are not consistent and vary between trials and publications. We hypothesized that the difference in pedoclimatic conditions and management practices may be responsible for the contrasting impact of sowing dates on crop establishment, growth, and yield.

Methods

A global meta-analysis of 94 studies and 3145 observations was conducted to quantify the effect of covariates related to crop types and pedoclimatic conditions in relation to early and late sowing dates compared to normal sowing dates.

Results

On average, early sowing significantly increased seedling emergence vigor (53 %, confidence interval (95 %) = [49 %,58 %]) and disease and pest control (88 % [20 %,195 %]) without significant effect on plant biomass (2 % [-2 %,5 %]) and yield (-10 % [-20 %, +0.8 %]) compared to normal sowing date. In contrast, late sowing had no significant effect on seedling emergence vigor (28 %[-4 %,72 %]) or disease and pest control (14 %[-1 %,31 %]) while it significantly decreased plant biomass (-21 %[-21.42 %,-21.12 %]) and yield (-24 % [-28 %, −19 %]) compared to normal sowing date, in particular when the sowing delay exceeded three weeks and when the average minimum temperature was above 13°C during the growing season.

Conclusions

Early sowing does not affect crop productivity while late sowing reduces crop yield. Shifting from normal to late sowing dates may lead to yield losses exceeding 20 %, especially in warm conditions.

Implications or significance

This study offers an important insight into the potential of crop yield improvement by adjusting sowing dates to aid decision-making in relation to specific pedoclimatic conditions and cropping practices.
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来源期刊
Field Crops Research
Field Crops Research 农林科学-农艺学
CiteScore
9.60
自引率
12.10%
发文量
307
审稿时长
46 days
期刊介绍: Field Crops Research is an international journal publishing scientific articles on: √ experimental and modelling research at field, farm and landscape levels on temperate and tropical crops and cropping systems, with a focus on crop ecology and physiology, agronomy, and plant genetics and breeding.
期刊最新文献
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