ISWC OpenIR  > 水保所知识产出(1956---)
砾石覆盖量对夏玉米作物系数及水分利用效率的影响
刘晓青1,2; 冯浩1,2; 冯浩1,2,3; 李毅1,2
2016
Source Publication干旱地区农业研究
Volume34Issue:2Pages:15-23
Abstract

为评价半湿润易旱地区砾石覆盖对土壤贮水量、作物生长与产量及水分利用效率的影响,利用杨凌地
区夏玉米2014 年实测数据及气象数据,基于Penman - Monteith 公式计算了砾石不同覆盖量下全生育期内参考作物
蒸发蒸腾量,并根据FAO 推荐的分段单值平均法,计算夏玉米各生育期作物系数,以及砾石不同覆盖量下作物水分
利用效率。结果表明:砾石覆盖的保水效果主要体现在作物生长初期,拔节期最大砾石覆盖处理0 ~ 200 cm 土壤贮
水量较对照增大12. 8%,后期由于冠层覆盖影响其效果减弱; 夏玉米全生育期作物系数与覆盖量呈线性关系; 覆盖量
越大,不同生育阶段的作物系数也相应增加; 叶面积和株高与作物系数有着较好的回归关系,可以对生育期内的玉米
蒸散量进行预报; 砾石覆盖可以缩短夏玉米生育期的天数,最大可缩短19 d; 砾石覆盖能促进作物生长,提高作物产
量,且在该试验覆盖量范围内,覆盖量越大,增产增效越明显,随覆盖量增加,各处理分别较对照提高4. 65% ~ 38.
17%; 作物水分利用效率随覆盖量的增大分别较对照提高2. 94% ~ 32. 99%。

Other Abstract

In order to evaluate the effects of gravel mulching in arid and semi-humid regions of China on soil water
storage,crop growth,crop yield and water use efficiency,based on the measured data of summer corn grown at Yangling
in 2014 and the meteorological data,evapotranspiration of the reference crop was calculated at various growth stages by adopting
the formula of Penman - Monteith. The actual crop evapotranspiration was calculated by adopting the formula of
field water balance equation,then the variation of the crop coefficient of different growing periods was analyzed,as well as
the water use efficiency under different mulching levels. The results showed that gravel mulching could maintain water at
the beginning of crop growth by 12. 8%,reaching the maximum at the jointing stage,and then became decreased because
of canopy. A linear relationship between gravel degree and crop coefficient was found. The larger the amount of coverage,
the higher the increases of the corresponding crop coefficients at different growing stages. Leaf area and plant height had
good regression relationships with crop coefficient,and thus corn evapotranspiration can be forecasted during the growth period.
Gravel mulching made the growing period shortened,reaching a the maximum of nineteen days. Gravel mulching
also preserved soil moisture better,and reduced soil evaporation,increased soil water storage and water retention
capacity,thereby increasing crop water use efficiency and yield by 4. 65% ~ 38. 17% and 2. 94% ~ 32. 00%,respectively. The effects became enhanced when the mulching coverage was increased extensively within the extent of
this research.

Keyword夏玉米 砾石覆盖 参考作物腾发量 作物系数 水分利用效率
Indexed By中文核心期刊要目总览
Language中文
Document Type期刊论文
Identifierhttp://ir.iswc.ac.cn/handle/361005/8750
Collection水保所知识产出(1956---)
Affiliation1.西北农林科技大学水利与建筑工程学院
2.西北农林科技大学中国旱区节水农业研究院
3.中国科学院水利部水土保持研究所
Recommended Citation
GB/T 7714
刘晓青,冯浩,冯浩,等. 砾石覆盖量对夏玉米作物系数及水分利用效率的影响[J]. 干旱地区农业研究,2016,34(2):15-23.
APA 刘晓青,冯浩,冯浩,&李毅.(2016).砾石覆盖量对夏玉米作物系数及水分利用效率的影响.干旱地区农业研究,34(2),15-23.
MLA 刘晓青,et al."砾石覆盖量对夏玉米作物系数及水分利用效率的影响".干旱地区农业研究 34.2(2016):15-23.
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