文献类型：期刊文献

中文题名：豫东平原3种模式杨树-小麦复合系统水分利用效率的研究

英文题名：Water Use Efficiency of Three Poplar-Wheat Intercropping Systems in Yudong Plain of He'nan Province

作者：何春霞[1,2] 张劲松[1,2] 黄辉[1,2] 孟平[1,2] 樊巍[3]

第一作者：何春霞

机构：[1]中国林业科学研究院林业研究所,国家林业局林木培育重点实验室,北京100091;[2]南京林业大学南方现代林业协同创新中心,江苏南京210037;[3]河南省林业科学研究院,河南郑州450008

年份：2015

卷号：28

期号：5

起止页码：660-668

中文期刊名：林业科学研究

外文期刊名：Forest Research

收录：CSTPCD;;Scopus;北大核心:【北大核心2014】；CSCD:【CSCD2015_2016】；

基金：国家自然科学基金项目(31170409,31100321);中央级公益性科研院所基本科研业务费专项(RIF2013-08)

语种：中文

中文关键词：农林复合;δ^13C;水分利用效率;耗水量;产量

外文关键词：agroforestry; δ^13C ; WUE; water use ; grain yield

分类号：S792.113

摘要：农林复合系统的林木和作物会充分利用水肥光热等资源,但搭配不合理也可能产生资源竞争,其中,种间水分竞争尤为突出。本文在冬小麦4个生育期内采用稳定碳同位素技术研究了豫东平原2年生、6年生和15年生3个间作模式的杨树-小麦复合系统的水分利用状况。结果表明:3种间作模式杨树和小麦的δ13C(稳定碳同位素比率)和WUE(水分利用效率)均总体表现为小麦拔节期最高。在整个小麦生育期(拔节期除外),2年生杨树的δ13C和WUE都显著高于6年生和15年生杨树。在小麦返青期,相比其他模式,2年生杨树间作小麦的δ13C和WUE最高;在拔节期、开花期和成熟期则均为单作小麦显著高于3种间作模式小麦。单作小麦的耗水量比与2年生杨树间作的小麦低25.71%,但分别是与6年生和15年生杨树间作小麦耗水量的2.78和1.88倍。3种林龄杨树-小麦间作模式总体都表现为树行中间和西侧的小麦WUE和耗水量大于树行东侧。2年生杨树间作小麦的株高、LMA(比叶重)、产量、总生物量、总耗水量和LER(土地当量)均高于单作小麦和其他模式间作小麦;但单作小麦的千粒质量、收获指数和产量水分利用效率则最大。2年生杨树-小麦间作模式的产量和土地利用率最高,但随着杨树的长大,间作模式内不再适合种植小麦,可替代种植一些耐荫作物。
In agroforestry system, trees and crops can make the best use of resources, such as water, nutrient, irra- diance and so on. However, competition, particularly the water competition, may occur when the species configura- tion is not appropriate. The water use of 2-, 6-, and 15-year-old poplar-wheat intercropping systems at four growth period of winter wheat in Yudong Plain area of He＇ nan Province was studied by using stable carbon isotope tech- nique. The water use efficiency （WUE） and water use quantity （WU） were calculated by using the stable carbon i- sotope ratio δ^13C , biomass and meteorological data. The results showed that the δ^13C and WUE of both poplar and wheat from all the systems showed the highest values at the jointing stages of wheat. Two-year-old poplar had the highest δ^13C and WUE values among the three intercropping systems during the whole wheat growth period （ex-cept the jointing stage）. The δ^13C and WUE of wheat from 2-year-old poplar-wheat intercropping was the highest a- mong all the four systems at the seedling establishment stages, while that of sole wheat were the highest during the following growth periods in jointing, flowering-filling and maturing. The water use of sole wheat was 25.71% less than that of 2-year-old poplar intercropped with wheat, but was 2.78 and 1.88 times that of 6-year-old and 15-year- old poplar intercropped with wheat, respectively. The WUE and WU of wheat in aU the three intercropping systems generally exhibited higher values at the middle and west of the tree rows than at the east. The wheat height, leaf mass per area, grain yield, total biomass, water use quantity and land equivalent ratio of 2-year-old poplar inter- cropped with reheat were higher than both sole wheat and wheat from the other two intereropping systems. However, the weight per thousand grain, harvest index and yield water use efficiency of sole wheat was the highest. The above results showed that 2-year-old poplar-wheat intercropping system had the greatest yield and highest land use efficien- cy. However, with the growing up of poplar trees, wheat is not appropriate to grow under the poplar, and some shade tolerant crop can be planted instead.