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甘薯叶腋扦插栽培技术试验 总被引:1,自引:0,他引:1
多年来,种植甘薯往往采用剪藤扦插栽培的方法,采用这种方法要等种苗长到1~2cm才能剪苗,往往不能适时(降雨后是插薯时间)早插,影响产量的提高。同时剪刀剪苗,容易破坏苗茎皮层组织,感染病毒和病菌,导致甘薯容易发病腐烂,大大影响了成薯的质量。为了解决此问题,我们根 相似文献
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《作物杂志》2017,(1)
针对北京市延庆区景观休闲农业结构调整和耕地资源紧张现状,开展了紫肉甘薯套作向日葵试验,研究了不同间作密度对该模式作物性状、产量和经济效益的影响。结果表明:间作可以增加甘薯种植效益,在3 125~12 500株/hm~2的向日葵间作密度范围内,随着向日葵密度的增加,甘薯产量呈先增加后减少的趋势,向日葵产量呈逐渐增加的趋势;向日葵间作密度在3 125~6 250株/hm~2时对甘薯产量有促进作用,其中向日葵间作密度为4 167株/hm~2时对甘薯的增产增效作用最大,此时甘薯产量可达33.48t/hm~2,增产比例13.26%,效益可达165 411元/hm~2,增效比例21.80%。 相似文献
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脱毒甘薯适宜密度初探 总被引:1,自引:0,他引:1
试验采用单因素的随机区组设计,探讨研究脱毒甘薯在720m海拔区的最佳群体结构,结果表明:以栽插5000/667m2窝产量最高,单产为2678.4kg/667m2,其次栽4000/667m2窝,单产为2537.6kg/667m2,第3是栽6000窝/667m2,单产为2436.8kg/667m2,栽插3000窝/667m2产量最低,单产为2122kg/667m2,经方差分析区组间不存在显著差异,处理间存在极显著差异,分析讨论认为栽4000~5000窝/667m2是甘薯一号在该地区的最佳密度,可作为指导大面积生产应用参考。 相似文献
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氮肥施用量对不同紫甘薯品种产量和氮素效率的影响 总被引:3,自引:0,他引:3
选取紫甘薯品种浙紫1号、宁紫2号和紫菁2号,设置3个施氮处理,即0 (N0)、75 (N1)和150 (N2) kg hm–2纯氮,于2013-2014年2个生长季在青岛农业大学现代农业科技示范园进行大田试验,研究不同氮肥用量对块根产量、干物质累积速率、氮素累积量及氮素效率的影响。结果表明,施用氮肥不同程度地降低了浙紫1号和紫菁2号的薯块产量,其中,浙紫1号的N1、N2处理分别较N0处理降低12.64%和13.32%,紫菁2号分别降低3.94%和29.06%;宁紫2号N1处理产量略高于N0处理,两年分别较N0处理提高8.5%和3.4%,而N2处理块根产量显著低于N0处理。茎蔓生物量和氮素累积量随着施氮量的增加而增加,而收获指数、氮素收获指数和氮素利用效率逐渐降低。第1年N1、N2处理的茎蔓干物质累积量分别较N0处理提高2.7%~20%和12.3%~36.4%,第2年分别提高12.6%~51.9%和28.7%~85.5%。相关分析表明,块根产量与氮素效率各指标均呈显著或极显著正相关;而茎蔓生物量与收获指数、氮素收获指数及氮肥利用效率均呈极显著负相关(r = –0.615**, –0.704**, –0.663**)。肥沃土壤上施用氮肥会造成浙紫1号和紫菁2号的茎蔓旺长,光合产物向薯块转运比例降低,导致源库比例不协调,块根产量下降。宁紫2号对氮肥的需求相对较高,施用氮肥75 kg hm–2时鲜薯产量提高,而施氮量过高时薯块产量降低。因此,紫甘薯在含氮量较高的肥沃土壤上种植时,对氮肥的需求量较低,茎蔓和薯块的协调生长是提高块根产量和氮素利用效率的保障。 相似文献
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甘薯不同密度栽培对产量的影响 总被引:2,自引:0,他引:2
采用不同品种不同密度二个因子随机区组试验[1],探索不同品种在不同密度栽培条件下的产量差异,结果表明:品种是影响甘薯产量的主要因素,同时对薯干率和淀粉含量作了分析[2],提出了首选生产、加工的品种。 相似文献
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脱毒甘薯一号不同移栽密度初探 总被引:1,自引:0,他引:1
为探索脱毒甘薯一号在务川县的最佳种植密度,2006年春季在遵义市农推站的安排下,进行了净作条件下不同密度试验。1材料与方法1.1试验地点及供试品种试验设置在务川县都濡杨村凤凰村民组毛永新责任地实施,海拔600m,年均温度16.0℃,地势向阳平坦,土壤为黄壤,肥力中等,前作油菜,试 相似文献
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脆片加工型紫色甘薯筛选品种比较试验 总被引:1,自引:1,他引:1
为了筛选出适合脆片加工使用的紫薯品种,以‘山川紫’为对照,2011年引进8个紫薯品种进行比较试验,从经济性状、生物学特性以及蒸食品质等方面进行筛选鉴定。结果表明:各品种表现不一,其中‘京紫6号’、‘桂紫12号’综合表现较好,鲜薯产量分别达到30214.5 kg/hm2和28042.5 kg/hm2,分别比对照高58.2%和46.8%;商品薯率较高,分别为88.2%和86.3%;薯块大小中等且整齐度好;口感软香甜粉,粗纤维量少,食用品质优良。这2个品种为初步筛选出的在经济性状、生物学品质以及蒸食品质方面符合脆片加工使用的品种。 相似文献
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海拔差异对紫色甘薯品种的影响 总被引:3,自引:0,他引:3
通过对引进的‘11-07’、‘16-08’、‘Y1’和‘SCZ’ 4个紫色甘薯品种分别在云南省玉溪市3个不同海拔的山地种植,分析其生物学特性、丰产性、品质等指标。结果表明:在海拔2000 m以上,以‘11-07’和‘SCZ’的产量较高,在海拔1600 m~1700 m左右,以‘SCZ’的产量最高。综合4个品种的产量和品质,‘SCZ’可作为有价值的商品紫薯品种引到玉溪的山地推广种植,‘11-07’可作为替补品种,为玉溪市不同海拔山地选择种植优良紫色甘薯品种提供科学依据。 相似文献
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为筛选适宜连城县种植的加工专用型紫色甘薯新品种,采取随机区组设计,以‘龙岩7-3’为对照,2012年秋季引进5个紫色甘薯新品种进行品种比较试验,从农艺性状、经济性状、薯块的营养品质、甘薯干和油炸脆片产品的加工品质等方面进行筛选鉴定。结果表明:各品种表现不同。其中,‘伟祥1号’鲜薯产量最高达41.9 t/hm2,比对照‘龙岩7-3’增产25.8%。‘济薯18号’鲜薯产量为31.6 t/hm2,与‘龙岩7-3’相当。‘济薯18’和‘伟祥1号’加工的甘薯干,不仅在工艺稳定性、口感、色变等综合指标,均接近‘龙岩7- 3’,而且在产品的形态、色泽、透明度、口感和质地等方面均表现优异,可作为加工甘薯干的紫薯品种。‘济薯18’和‘伟祥1号’加工的油炸薯片,含油率适中,膨化度高,产品品质与对照‘龙岩7-3’相当,可作为加工油炸薯片的紫薯品种。‘福薯9号’、‘泉紫薯1号’和‘宁紫薯1号’的薯形美观,营养品质高,食味粉香,适合优质鲜食和加工甘薯全粉用。 相似文献
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以紫心甘薯为主要原料,研制低糖紫心甘薯脯。分别对产品的护色、硬化及风味等工艺条件进行了优化,产品风味独特、营养丰富。实验所得的最佳配方为:0.3%的柠檬酸钠,0.3%的明矾溶液,0.05%柠檬酸和一定量糖。 相似文献
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Planting times of potato in subtropical China vary and are often not optimal; their effects were studied in association with those of plant density. The research programme included 10 trials at three elevations (500, 750, 1200 m asl) in the spring and autumn seasons of 2 years with several contrasting varieties and different seed origins. Earlier planting in spring increased yield at 500 m asl. This effect was associated with better light use efficiency, higher rates of photosynthesis and more tubers per plant. At 750 m asl the effects of planting time in spring were the opposite: later planting increased yield. At 1200 m asl effects on yield were absent. Effects of planting time in autumn on yield were generally absent at all elevations, although plant stands at early planting were consistently and often severely reduced. Denser planting produced yields that were higher per unit area because of larger accumulated canopy cover but were lower per plant. Higher density consistently reduced plant stand. Density did not interact with planting time, not even in those experiments in which planting time also affected plant stands.
Optimal planting time depended on the amount of rainfall prior to planting especially in the autumn season, but also on cultivar and dormancy of the seed tubers used. The earlier variety yielded more than the later variety at low elevation, whereas the later variety yielded more at higher elevation. It is necessary to use cultivars that tuberize early to make better use of the limited growing period at lower elevation. The large variation of dormancy that affects plant growth and yield is caused primarily by differences in accumulated temperature sum (as affected by planting time, elevation of growth and storage, and season), genetics (variety), and their interaction with cultivation techniques. 相似文献
Optimal planting time depended on the amount of rainfall prior to planting especially in the autumn season, but also on cultivar and dormancy of the seed tubers used. The earlier variety yielded more than the later variety at low elevation, whereas the later variety yielded more at higher elevation. It is necessary to use cultivars that tuberize early to make better use of the limited growing period at lower elevation. The large variation of dormancy that affects plant growth and yield is caused primarily by differences in accumulated temperature sum (as affected by planting time, elevation of growth and storage, and season), genetics (variety), and their interaction with cultivation techniques. 相似文献
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紫色甘薯花青素的提取工艺研究 总被引:1,自引:0,他引:1
田其英 《农产品加工.学刊》2011,(6):48-51
对超声波辅助提取紫色甘薯花青素的工艺条件进行了研究,以花青素的提取率为评价指标,在单因素试验的基础上,利用响应面法对提取工艺条件进行优化。在分析了各因素的显著性和交互作用后,得出超声波辅助提取紫色甘薯花青素的最佳提取工艺:提取时间40 min,提取温度75℃,液料比10∶1,在此条件下,所得花青素提取率为1.70%。 相似文献