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2010-2011年,对豌豆与小麦在高寒阴湿区不同间作比例下的生育期、叶面积指数及综合产量等进行研究。结果表明:间作可明显延长豌豆的生育期,提高豌豆叶面积指数、综合产量及经济效益。其中处理M2D2即小麦与豌豆按2∶2行比例间作生育期最长,叶面积指数最高,土地当量比最大,具有明显的产量优势,2010和2011年间作综合产量分别较小麦单作(MT)提高58.11%和38.55%,较豌豆单作(DT)提高29.70%和50.87%;全年经济效益分别较小麦单作(MT)的提高112.66%和83.45%;较豌豆单作(DT)提高4.97%和22.08%。因此,豌豆小麦间作模式增产的关键在于行比的合理搭配。 相似文献
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玉米花生间作复合体系光合特性的研究 总被引:31,自引:2,他引:31
以单作玉米和单作花生为对照,研究了间作玉米花生功能叶片的光合速率、PSⅡ最大光化学效率(Fv/Fm)和PSⅡ实际光化学效率(ΦPSⅡ)的日变化以及叶绿素含量。结果表明,间作提高了玉米、花生叶绿素含量,其光合速率日变化呈单峰曲线,中午达到最大值;玉米东西行向种植东侧功能叶片的光合速率,上午间作明显大于单作,下午相反;间作明显提高了玉米阴天和晴天的光合速率,却明显降低了花生光合速率;在晴天,间作玉米花生的Fv/Fm、ΦPSⅡ日变化均呈倒抛物线,上午间作玉米明显大于单作的,下午相反,间作明显提高了花生的Fv/Fm,中午花生的ΦPSⅡ间作低于单作,上午和下午反之;阴天的Fv/Fm、ΦPSⅡ,间作玉米除中午小于外,上午和下午均大于单作玉米,间作花生全天均高于单作花生,说明玉米花生间作提高了花生对弱光的吸收利用效率。 相似文献
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简要介绍了间套作对世界粮食安全的重要性,并对间套作领域当前主要的研究进展进行了综述与讨论。首先,综述了间套作复合群体在光能利用特性,指出了间套作可通过增强叶片光合性能和提高光的截获率与转化效率显著提高光能利用率。其次,综述了不同间套作复合群体在氮、磷、钾养分及水分利用等方面存在的竞争和互补利用现象,讨论了各种间套作类型资源高效利用的可能机制。最后,综述了间套作对产量和品质的影响。间套作可以使产量提高20%~50%,合理的种植密度和复合群体结构是高产的关键。不同间套作类型对秸秆和籽粒粗蛋白、粗纤维、粗脂肪、粗灰分及无氮浸出物等营养物质含量和产量的影响。通过以上几个方面的讨论,指出了间套作研究在资源集约利用、产量和品质等方面存在的不足和需进一步研究的问题。 相似文献
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日光温室间作新模式对环境因子及菇菜生长的影响 总被引:4,自引:0,他引:4
采用反遮光内拱棚模式,在日光温室内进行菇菜间作,研究对环境因子及菇菜生长的影响。结果表明:反遮光内拱棚日均温度15.5℃,最高22℃,最低12℃;相对湿度平均96.7%,最高99%,最低90%;光照强度最高为0.5klx;CO2平均浓度为828μL·L-1,最高为1000μL·L-1,最低为630μL·L-1,完全满足金针菇生长需求。通过斜拉秧措施,极大提高了黄瓜窄行光照强度,提高了保护地栽培效益。 相似文献
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Bi-directional nitrogen transfer in an intercropping system of peanut with rice cultivated in aerobic soil 总被引:1,自引:0,他引:1
Three separate greenhouse experiments were conducted to determine the bi-directional N transfer in a peanut and rice intercropping system using the direct 15N foliar feeding technique at N application rates of 15, 75 and 150 kg ha–1. When peanut was used as the 15N donor plant, the atom % 15N in the rice shoot was consistently higher than in control rice, indicating that 15N transfer from peanut to the associated rice crop occurred. The percentage of N transfer (%NT) from peanut to the associated rice was 9.9%, 5.7% and 4.2% at the three N application rates, respectively. The N transferred from peanut to rice was 22.6, 15.5 and 8.2 mg N plant–1, accounting for 10.9%, 6.4% and 3.1% of the total N accumulated in rice plants at the three N application rates, respectively. When rice functioned as the 15N donor plant, the %NTs were 4.4%, 2.1% and 1.4% and represented about 5.2%, 3.4% and 2.4% of total N accumulated in peanut shoot at the three N application rates, respectively. The net directional N transfer was from peanut to rice and this was calculated by the difference in the bi-directional transfers and was mainly due to peanut root decomposition. Thus, the %NTs were 10.7%, 6.3%, 5.1% and 3.5% on 28 July (the day on which peanut shoots were cut), 8 August, 28 August and 8 September, respectively, and correspondingly, the N transferred from peanut to rice represented 6.0%, 5.8%, 5.1% and 3.2% of the total N accumulated in the rice plants. 相似文献
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试验选择小麦/蚕豆模式,设计不同的磷水平,对小麦/蚕豆系统经济产量和相关生理指标做 了初步分析。结果得出:供磷显著提高了小麦和蚕豆的经济产量。与不供磷(P0)相比,中磷处理(P1)小 麦籽粒增产51.78%,蚕豆增产24.16%;高磷处理(P2)小麦增产58.05%,蚕豆增产23.74%。结果也表 明:供磷提高系统经济产量可能是由于磷是光合作用的底物和调节物,有利于小麦抽穗期(蚕豆开花 期)作物上位叶片叶绿素含量的提高,同时增加了植株中光合中间产物可溶性糖的积累,促进营养物 质向籽粒的转化。供磷也提高了作物叶片游离脯氨酸的含量,但处理间差异不显著。 相似文献
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