Effect of Relative Sowing Time on the Growth and Yield of the Component Crops in Okra/Maize and Okra/Cowpea Intercropping Systems     

C. O. Muoneke  J. E. Asiegbu  A. C. C. Udeogalanya 《Journal of Agronomy and Crop Science》1997,179(3):179-185

The effects of variations in the relative sowing time of component crops in okra/maize and okra/cowpea intercropping systems were examined in 1990 and 1991 cropping seasons. Okra was either sown the same day as, or two weeks before or after maize or cowpea. Intercropping reduced the growth and yield of okra, maize and cowpea relative to their sole crops. However, okra yield was depressed more by maize than by cowpea, especially when okra was sown two weeks after maize. Comparative assessment of okra/maize and okra/cowpea mixtures suggests that it is better to grow okra and cowpea together than intercropping okra and maize because yield advantages were always higher in okra/cowpea (67% and 59% in 1990 and 1991 respectively) than in okra/maize (15% and 29%). The results were discussed in light of competitive abilities of the various components in the mixtures.  相似文献   

闽南菜用黄秋葵品种及其栽培技术     

曾日秋  洪建基  姚运法  赖正锋 《福建农业科技》2014,(10):26-27

介绍目前在闽南地区种植面积较大的黄秋葵品种——新星5角、五福、卡里巴的主要特征、商品性状和产量表现,并总结菜用黄秋葵主要栽培技术.  相似文献   

Vegetative compatibility of cotton-defoliating <Emphasis Type="Italic">Verticillium dahliae</Emphasis> in Israel and its pathogenicity to various crop plants   总被引：2，自引：0，他引：2  

Nadia Korolev  Encarnación Pérez-Artés  Jesús Mercado-Blanco  José Bejarano-Alcázar  Dolores Rodríguez-Jurado  Rafael M. Jiménez-Díaz  Talma Katan  Jaacov Katan 《European journal of plant pathology / European Foundation for Plant Pathology》2008,122(4):603-617

Verticillium dahliae isolates recovered from a new focus of severe Verticillium wilt of cotton in the northeast of Israel were tested for vegetative compatibility using nitrate non-utilizing (nit) mutants and identified as VCG1, which is a new record in Israel. Other cotton isolates of V. dahliae from the northern and southern parts of the country were assigned to VCG2B and VCG4B, respectively. VCG1 isolates induced severe leaf symptoms, stunting and defoliation of cotton cv. Acala SJ-2, and thus were characterized as the cotton-defoliating (D) pathotype, whereas isolates of VCG2B and VCG4B were confirmed as the earlier described defoliating-like (DL) and non-defoliating (ND) pathotypes, respectively. This is the first record of the D-pathotype in Israel. The host range of representative isolates of each VCG-associated pathotype was investigated using a number of cultivated plants. Overall, the D isolates were more virulent than DL isolates on all tested host plants, but the order of hosts (from highly susceptible to resistant) was the same: okra (Hibiscus esculentus local cultivar), cotton (Gossypium hirsutum cv. Acala SJ2), watermelon (Citrullus lanatus cv. Crimson Sweet), safflower (Carthamus tinctorius cv. PI 251264), sunflower (Helianthus annuum cv. 2053), eggplant (Solanum melongena cv. Black Beauty), and tomato (Lycopersicon esculentum cv. Rehovot 13). The pattern of virulence of ND isolates differed from that of D and DL isolates, so that the former were highly virulent on eggplant but mildly virulent on cotton. Tomato was resistant to all cotton V. dahliae isolates tested. RAPD and specific PCR assays confirmed that the D isolates from Israel were similar to those originating from other countries.  相似文献   

海南大棚黄秋葵引种比较     

樊超  董德建  唐立郦  刘琳帅  马启慧 《安徽农业科学》2017,45(18)

[目的]引进适合在海南大棚种植的黄秋葵[Abelmoschus esculentus(L.)Moench]品种。[方法]引进红五福、绿五福、东方、助农2号、杨贵妃、绿羊角、巴里斯顿、东京5号和农友早生1号这9个黄秋葵品种,在海南大棚内进行比较。综合2年的数据,对各品种生育期、形态特征、果实性状、产量以及抗性进行比较。[结果]助农2号、杨贵妃、绿羊角和东京5号这4个品种均适合在海南大棚内种植。[结论]该研究可为黄秋葵在海南的推广种植提供参考。  相似文献   

Impact of okra leaf curl disease on morphology and yield of okra     

Fidèle Tiendrébéogo  V.S. Edgar Traoré  Jean-Michel Lett  Nicolas Barro  Gnissa Konaté  Alfred S. Traoré  Oumar Traoré 《Crop Protection》2010

The impact of okra leaf curl disease on four accessions of a local okra cultivar and four commercial okra cultivars was assessed in field conditions from June to October in 2007 and 2008. Disease incidence varied from 68.5% to 72.5% among accessions of the local cultivar while commercial cultivars were much less infected (8.7–16.2%). Diseased plants of the local cultivar suffered more reduced growth (58% reduction) than those of the commercial cultivars (39.6%). The number of marketable fruits per plant, the fruit length, fruit diameter and fruit weight which were subject to reductions of 26–61%, 19–64%, 6–42% and 23–63%, respectively. The overall yield losses were significantly higher in accessions of the local cultivar (26–55%) than in the commercial ones (4.4–9.6%). The average economic losses for one hectare of crop were estimated at of 11,100 USD and 1950 USD, respectively for the local and the commercial cultivars.  相似文献   

Chemical composition and biological evaluation of Okra (Hibiscus esculentus) seeds and their kernels     

P. Udayasekhara Rao 《Plant foods for human nutrition (Dordrecht, Netherlands)》1985,35(4):389-396

Okra (Hibiscus esculentus) whole seeds and their kernels were analysed for their nutrient composition. They were rich in protein as well as fat. Most of the protein and fat of the seed is accumulated in the kernel while crude fiber is concentrated in the seed coat or hull. Its essential amino acid composition was nearly equal to that of the WHO/FAO reference pattern (1973), but lower than that of whole egg protein; its chemical score was 67. Diets containing whole seed and kernel protein at the 10% level were fed to weanling rats both in the raw and cooked forms for 4 weeks. Dry matter digestibility and protein digestibility of whole seed diets were significantly lower than the kernel diets. Cooking improved PER and NPU values of both the whole grain and kernel diets. These results indicated that dietary fiber present in the hull of Okra seed as well as heat labile antinutritional factors present in the seed hinder Okra seed protein utilization.  相似文献   

黄秋葵与红秋葵杂交育种的初步研究     

沈文杰  李育军  李光耀  冯强  植石灿  秦树香  黄妙林  曾仕晓  王东平 《长江蔬菜》2016,(10):34-39

以9个黄秋葵品种为基本材料,通过连续多代自交获得自交系后,分析和比较了各个自交系的性状特点,选择了8个性状较为优良的自交系作为亲本进行配对,制成了14个单交种材料,同时,首次尝试将黄秋葵与红秋葵进行杂交,获得了果实颜色介于两亲本之间的中间类型。通过调查和比较,筛选出2个具有产量优势的杂交组合。在杂交育种过程中,也发现了可利用叶柄颜色作为标记性状来生产杂交黄秋葵种苗的新方法。  相似文献   

黄秋葵种子萌发生理特性分析   总被引：7，自引：0，他引：7  

陈禅友  童莉 《种子》2004,23(11):14-17

本文探讨了黄秋葵种子发芽率和种子活力等指标的形成与应用,并测定了黄秋葵种子萌发期间的吸水量、呼吸速率和过氧化氢酶活性变化及其种子活力.结果表明,黄秋葵种子属快速发芽种子,这可能与其吸水快,代谢启动快以及呼吸、酶活性等生理生化变化等有关.吸水速度很快、量大且持续时间较长,24h后吸水量上升到77.8%,6d后达196%;呼吸速率和过氧化氢酶活性变化曲线均较平稳,24h后呼吸速率上升到较高水平(5.31 μmol·g-1·min-1),随后3d内呼吸速率略有下降,第5天达到小高峰(5.98μmol·g-1·min-1),并维持在较高水平;过氧化氢酶活性也在24h后达到较高水平(31.00mg·g-1·min-1),2～4d内其活性平稳上升,高峰不明显.  相似文献   

割茎再生技术对黄秋葵产量及品质的影响   总被引：1，自引：0，他引：1  

刘勇  万三连  吴乾兴  罗丰  肖日升  孔祥义 《中国蔬菜》2015,1(5):49

采用割茎再生技术,研究其对台湾五福、绿羊角、东京五角、早生五角、黄秋葵1号、黄秋葵2号等6种冬种黄秋葵品种的果实性状、品质以及经济效益的影响。结果表明:割茎再生技术可以使黄秋葵的采摘期提前40d左右,采收期延长30d左右;割茎再生技术可以在冬种黄秋葵种植采收末期应用,黄秋葵果实可作越夏蔬菜供应;割茎再生后的台湾五福黄秋葵的果实性状、品质及经济效益最好,每667m2纯收益增加8800~9750元,日均收益达62.0~68.7元,是最适宜在海南省三亚市进行割茎再生栽培的黄秋葵品种。  相似文献   

鸡脚叶标记的三系杂交棉光合特性的研究   总被引：10，自引：0，他引：10  

朱伟  王学德  华水金  张小全  蒋培东 《中国农业科学》2005,38(11):2211-2218

 以超鸡脚叶、鸡脚叶和正常叶棉花不育系及其恢复系为亲本材料，按NCⅡ交配设计，配制5类不同叶形的24个杂种，对各叶形杂种产量、品质和光合作用等性状的表现及其性状间的相关性进行了分析研究。测定发现，超鸡脚叶、鸡脚叶、中鸡脚叶、大鸡脚叶和正常叶5类杂种的生育期依次随叶面积系数增加而延长，中鸡脚叶杂种因具有适中的生育期和叶面积系数，产量和光合作用性状的综合表现最好。与对照（中杂29）比，中鸡脚叶杂种的籽棉产量增加1.16%，皮棉产量增加2.06%，纤维长度增加3.60%，麦克隆增加2.33%，生育期缩短10d。不同时期光合指标测定的结果表明，中鸡脚叶杂种除了生育后期Pn（净光合速率）、Gs（气孔导度）和Tr（蒸腾速率）稍低于正常叶杂种和对照外，其它时期Pn、Gs和Tr高于正常叶杂种和对照，且Ci（胞间CO2浓度）低于正常叶杂种。Pn与杂种产量的大多数性状呈正相关，其中与籽棉产量相关性最大，铃数和铃重次之，果枝数最小。考察不同叶形杂种结铃期上、中、下层叶光合性状发现，超鸡脚叶和鸡脚叶杂种下层的光照强度、透光率、Pn和Gs高于其它叶形杂种，其中超鸡脚叶杂种透光率和Pn最大，分别比对照高94.12%和45.54%，但上和中层叶的Pn较低。中鸡脚叶杂种上、中、下三层Pn和Gs高于正常叶杂种和对照, 上层Pn较对照高8.06%，中层Pn较对照高1.67%，下层Pn较对照高30.77%。认为中鸡脚形杂种具有良好的光合作用特性，对于产量和品质优势的表达具有重要促进作用。上层Pn较对照高5.4%，中层Pn较对照高1.7%，下层Pn较对照高30.8%。研究认为中鸡脚形杂种具有良好的光合作用特性，对于产量和品质优势的表达具有重要促进作用。  相似文献