Predicting intercrop competition, facilitation, and productivity from simple functional traits
Predicting intercrop competition, facilitation, and productivity from simple functional traits
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从简单的功能性状预测间作竞争、促进和生产力
DOI：
10.1016/j.fcr.2023.108926
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发表时间：
2023
影响因子：
5.8
通讯作者：
MacLaren C
中科院分区：
文献类型：
--
作者：
MacLaren C
最近的元分析表明，间作可以提高作物生产的土地利用效率平均20- 30%，这表明间作对可持续集约化有很大的潜在贡献。然而，这一平均值存在很大的差异：个别研究的范围从单一作物的土地生产力的一半到两倍不等。豆类-谷物间作和具有高时间生态位分离的间作往往比平均产量更高，但这两种组合类型并不总是合适的。有必要探索其他的可能性，以实现生产intercrops.Research QuestionWe探讨了是否两个简单的功能特性参与辐射的使用，植物的营养高度和比叶面积（SLA），可以用来预测间作生产力。高度和SLA一起与关键植物的生活史和资源经济战略确定竞争力和竞争的容忍度，特别是在光，因此可以预期巩固在intercrops.MethodsIn我们的研究的第一年，我们种植的作物在肯尼亚的一个网站，并测量其高度和SLA的单作。第二年，我们在肯尼亚的两个地点和尼日利亚的一个地点种植了单作、间作和单株处理的作物。总之，这些处理使我们能够确定每个间作组合是否丰产或低产，以及是否有任何丰产是由促进和/或种内竞争的差异驱动的。然后，我们相关的强度，这些相互作用的两个traffic.ResultsWe发现，间作粮食产量的高度和SLA的每一个物种在间作，但这些特性解释了不到三分之一的变化，间作土地当量比（LER）。更多的变异可以通过考虑场地效应来解释，这表明这两个性状与场地条件相互作用以决定产量。生物量LER的粮食LER的反应不同，这表明，在资源分配的可塑性间作条件下可能会进一步影响yield.ConclusionsOur研究发现，一些证据表明，物种相结合的特性，表明对比反应的竞争（一个回避的物种与宽容的物种）可以增加资源利用的互补性，从而间作丰产。然而，很明显，其他因素（如额外的性状，或现场互动的性状）需要完善我们的理解间作productive.ImplicationsA基于性状的框架有潜力预测间作生产力，但简单的措施高度和SLA单独是不够的。
ContextRecent meta-analyses demonstrate that intercropping can increase the land use efficiency of crop production by 20–30 % on average, indicating a strong potential contribution to sustainable intensification. However, there is substantial variability around this average: individual studies range from half to double the land productivity of monocrops. Legume-cereal intercrops and intercrops with high temporal niche separation tend to be more productive than the average, but these two combination types are not always suitable. There is a need to explore other possibilities to achieve productive intercrops.Research questionWe explored whether two simple functional traits involved in radiation use, plant vegetative height and specific leaf area (SLA), could be used to predict intercrop productivity. Height and SLA together are associated with key plant life-history and resource economy strategies determining competitiveness and tolerance of competition, especially with regard to light, and could therefore be expected to underpin overyielding in intercrops.MethodsIn the first year of our study, we grew crops as monocrops at one site in Kenya and measured their height and SLA. In the second year, we grew crops in monocrop, intercrop, and single plant treatments at two sites in Kenya and one site in Nigeria. Together, these treatments allowed us to identify whether each intercrop combination overyielded or underyielded, and whether any overyielding was driven by facilitation and/or differences in inter- vs intraspecific competition. We then related the strength of these interactions to the two traits.ResultsWe found that intercrop grain yields varied in relation to the height and SLA of each species in the intercrop, but together these traits explained less than a third of variation in intercrop land equivalence ratios (LER). More variation could be explained by allowing for the effect of site, suggesting that the two traits interact with site conditions to determine yield. Biomass LERs responded differently to grain LERs, suggesting that plasticity in resource allocation in response to intercropping conditions may further influence yields.ConclusionsOur study found some evidence that combining species with traits indicating contrasting responses to competition (an avoidant species with a tolerant species) could increase resource use complementarity and thus intercrop overyielding. However, it was clear that other factors (such as additional traits, or the trait by site interaction) are needed to refine our understanding of intercrop productivity.ImplicationsA trait-based framework has potential to predict intercrop productivity, but simple measures of height and SLA alone are insufficient.
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影响因子：
10
作者：
van der Plas, Fons
通讯作者：
van der Plas, Fons
养殖物种的正确组成和多样性能否改善小农的粮食安全？
影响因子：
4.7
作者：
MacLaren C
通讯作者：
MacLaren C
群落特征影响跨气候梯度的植物间相互作用
DOI：
--
发表时间：
2017
期刊：
影响因子：
--
作者：
Stella M. Copeland;S. Harrison
通讯作者：
S. Harrison
影响因子：
9.8
作者：
Diaz, Sandra;Kattge, Jens;Cornelissen, Johannes H. C.;Wright, Ian J.;Lavorel, Sandra;Dray, Stephane;Reu, Bjoern;Kleyer, Michael;Wirth, Christian;Prentice, I. Colin;Garnier, Eric;Boenisch, Gerhard;Westoby, Mark;Poorter, Hendrik;Reich, Peter B.;Moles, Angela T.;Dickie, John;Zanne, Amy E.;Chave, Jerome;Wright, S. Joseph;Sheremetiev, Serge N.;Jactel, Herve;Baraloto, Christopher;Cerabolini, Bruno E. L.;Pierce, Simon;Shipley, Bill;Casanoves, Fernando;Joswig, Julia S.;Guenther, Angela;Falczuk, Valeria;Rueger, Nadja;Mahecha, Miguel D.;Gorne, Lucas D.;Amiaud, Bernard;Atkin, Owen K.;Bahn, Michael;Baldocchi, Dennis;Beckmann, Michael;Blonder, Benjamin;Bond, William;Bond-Lamberty, Ben;Brown, Kerry;Burrascano, Sabina;Byun, Chaeho;Campetella, Giandiego;Cavender-Bares, Jeannine;Chapin, F. Stuart;Choat, Brendan;Coomes, David Anthony;Cornwell, William K.;Craine, Joseph;Craven, Dylan;Dainese, Matteo;de Araujo, Alessandro Carioca;de Vries, Franciska T.;Domingues, Tomas Ferreira;Enquist, Brian J.;Fagundez, Jaime;Fang, Jingyun;Fernandez-Mendez, Fernando;Fernandez-Piedade, Maria T.;Ford, Henry;Forey, Estelle;Freschet, Gregoire T.;Gachet, Sophie;Gallagher, Rachael;Green, Walton;Guerin, Greg R.;Gutierrez, Alvaro G.;Harrison, Sandy P.;Hattingh, Wesley Neil;He, Tianhua;Hickler, Thomas;Higgins, Steven I.;Higuchi, Pedro;Ilic, Jugo;Jackson, Robert B.;Jalili, Adel;Jansen, Steven;Koike, Fumito;Koenig, Christian;Kraft, Nathan;Kramer, Koen;Kreft, Holger;Kuehn, Ingolf;Kurokawa, Hiroko;Lamb, Eric G.;Laughlin, Daniel C.;Leishman, Michelle;Lewis, Simon;Louault, Frederique;Malhado, Ana C. M.;Manning, Peter;Meir, Patrick;Mencuccini, Maurizio;Messier, Julie;Miller, Regis;Minden, Vanessa;Molofsky, Jane;Montgomery, Rebecca;Montserrat-Marti, Gabriel;Moretti, Marco;Mueller, Sandra;Niinemets, UElo;Ogaya, Roma;Oellerer, Kinga;Onipchenko, Vladimir;Onoda, Yusuke;Ozinga, Wim A.;Pausas, Juli G.;Peco, Begona;Penuelas, Josep;Pillar, Valerio D.;Pladevall, Clara;Roemermann, Christine;Sack, Lawren;Salinas, Norma;Sandel, Brody;Sardans, Jordi;Schamp, Brandon;Scherer-Lorenzen, Michael;Schulze, Ernst-Detlef;Schweingruber, Fritz;Shiodera, Satomi;Sosinski, Enio;Soudzilovskaia, Nadejda;Spasojevic, Marko J.;Swaine, Emily;Swenson, Nathan;Tautenhahn, Susanne;Thompson, Ken;Totte, Alexia;Urrutia-Jalabert, Rocio;Valladares, Fernando;van Bodegom, Peter;Vasseur, Francois;Verheyen, Kris;Vile, Denis;Violle, Cyrille;von Holle, Betsy;Weigelt, Patrick;Weiher, Evan;Wiemann, Michael C.;Williams, Mathew;Wright, Justin;Zotz, Gerhard
通讯作者：
Zotz, Gerhard
影响因子：
3
作者：
Bourgeois, Berenger;Munoz, Francois;Violle, Cyrille
通讯作者：
Violle, Cyrille