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为确定紫甘薯新品种“内渝紫2号”最佳种植株距,为新品种的示范推广提供技术依据,设置5种不同株距(20、25、30、35、40cm),对不同株距条件下紫甘薯“内渝紫2号”的植株性状、产量性状进行调查分析。结果表明：加大株距有利于提高茎蔓长度、分枝数、单株结薯数、单株鲜薯质量和大中薯比例;在30～40 cm范围内,缩小株距,有利于提高鲜薯产量、茎叶产量和薯干产量;30 cm株距时鲜薯产量和薯干产量最高,667 m2产量分别为1 722.67 kg和480.63 kg。综合考虑,建议“内渝紫2号”栽培株距为30 cm,可获得较为理想的鲜薯产量。 相似文献
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应用一绳双蔓栽培技术,可有效提高种植密度,提高日光温室光热资源利用率。在行距70 cm情况下,一绳双蔓栽培较双绳双蔓栽培株距由50 cm降至30 cm,667 m2种植密度由2 380株提高到3 170株。每667 m2可多定植790株,单瓜质量在1.6 kg左右,667 m2可增加西瓜产量1 200 kg以上,增收6 000元左右。 相似文献
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富硒巨型香芋为一年生或多年生浅根蔓生薯类作物,适生地域广。薯块呈球形,蔓细短,只需搭1．2m高的简易栽培架即可。3月中旬一4月上旬播种,11月～翌年3月下旬收获。单株结薯15～20个,多达40个,当年薯单薯重20～50g,最大500g以上,比普通香芋大20多倍。每667m2栽8000株,667m2产量800kg左右,高产田块可达1500kg,每kg售价10-20元、特大薯每kg售价高达30～60元,一般667m2收入6000元左右,作多年生栽培薯块更大, 相似文献
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《中国园艺文摘》2016,(8)
以马铃薯‘荷兰15’一级种为试验种植材料,探讨马铃薯‘荷兰15’磷肥4种施用量的鲜薯产量、商品薯产量与经济效益。结果表明,适当增加磷肥(P2O5)施用量,可以提高出苗率,增加鲜薯产量、商品薯产量与经济效益。磷肥(P2O5)施用量8 kg/667 m2的鲜薯产量、商品薯产量最高,每667 m2分别为2 513.3 kg和2 254.5 kg,极显著高于不施磷肥鲜薯产量与商品薯产量,显著高于磷肥(P2O5)施用量12 kg/667 m2的鲜薯产量与商品薯产量。磷肥(P2O5)施用量8 kg/667 m2的经济效益最高,为2 965.9元,比不施磷、磷肥(P2O5)施用量4、12 kg/667 m2分别增效1 175.4、805.3和646.4元。综合考虑,承德中南部区域种植马铃薯‘荷兰15’,磷肥(P2O5)施用量8 kg/667 m2最适宜。此水平磷肥(P2O5)施用量的鲜薯产量、商品薯产量及经济效益均最高。 相似文献
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浙薯78为浙江省农科院新育成的特早熟迷你型菜用甘薯新品种,该品种红皮红肉,圆形或短纺锤形,表皮光滑,无纵沟和裂纹,单薯重50～250g,500g以上的大薯很少。鲜薯干率26%～28%,还原糖含量4%～5%,鲜薯甜度不受气温影响,夏季高温时期收获蒸煮食用,口味甜、粉,秋季收获口味甜、软。1特征特性植株生长势中等,短蔓,一般蔓长1.5m以内,宜密植,不耐肥,不耐旱。适宜生育期75～120天,最佳生育期90～100天。刚成型的小薯较圆,因此在夏秋季60天也可收获,但产量偏低,一般100天生育期每667m2鲜薯产量1500～2000kg,高产田块可达2500kg以上,50～250g迷你型商品… 相似文献
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以"永甜十一"薄皮甜瓜品种为试材,研究了萌蔓式留二茬瓜方式对甜瓜坐果性状及产量的影响。结果表明:在开花时即留基部萌蔓,其萌蔓率较高,5d后萌蔓率达76.6%;头茬瓜沾花时、坐果时及坐果后7d基部留蔓的头茬瓜膨大速度相近;坐果后7d基部留蔓的单株坐果率最高,为54.8%,头茬瓜沾花时基部留蔓的单株优果率最高,为81.4%;总产量以一茬瓜收获前10d,在原瓜秧处补种的处理最高,667m2产量5 198.7kg;头茬瓜沾花时基部留蔓的总收入最高,667m2收入56 877.0元,比对照667m2增收18 089.7元,可见,各种留蔓处理方式收入差异较大的原因是由于二茬瓜收获时期早晚的价格差异引起的。 相似文献
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The effects of combinations of salinity (no salt, 2000 p.p.m. or 4000 p.p.m. of CaCl2 and NaCl, 1:1) and water table (30 cm, 60 cm or 90 cm from the soil surface), on the vegetative growth and tolerance of ‘Golden Japanese’ plum and ‘Mit Ghamre’ and ‘Balady’ peaches were studied. The plants were grown in lysimeters. The growth of the trunk, total shoot length, the increase in shoot length per cm and the fresh weight of top, root and total plant were reduced with increasing salinity of the irrigation water. The effect was accentuated when the plants were maintained at high water table level. The salinity treatments resulted in the death of 43%, 73% and 76% of the plants in the plum, and the ‘Mit Ghamre’ and ‘Balady’ peaches, respectively, indicating that the plum is more tolerant to salinity than the peach. The plants of the salinity treatments showed various symptoms of salt injury, such as leaf burn, defoliation, shoot die-back and finally death. In the peaches, salt injury started to occur in the first growing-season, whereas the salt injury appeared in the plum in the second growing-season. The symptoms were more pronounced in the 4000 p.p.m. treatment than in the 2000 p.p.m. treatment and were more pronounced at the high water table level. The salinity level was the predominant factor and the effect of the water table on the vegetative growth diminished with increase in the salinity level of the irrigation water. 相似文献
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AIM：To establish a fast, accurate and economical technique for culturing mouse pulmonary arteriolar smooth muscle cells (PASMCs), and to explore the effects of hypoxia on the proliferation and apoptosis of the PASMCs. METHODS：In sterile condition, the pulmonary artery was isolated from the male BALB/c mice by digesting with collagenase I, and the cells were cultured in fetal bovine serum-coated flask. Centrifugal procedure was not used during the cell passage. The cell morphology was observed under an inverted phase-contrast microscope. α-Smooth muscle actin was identified by immunocytochemistry and immunofluorescence. The effects of hypoxia on the proliferation and apoptosis of the PASMCs were detected by CCK-8 assay and TUNEL assay. RESULTS：PASMCs were identified by the methods of immunocytochemistry, immunofluorescence staining and observation of morphology. Unlike the rat PASMCs with typical subcultured peak-vally pattern, the mouse PASMCs showed a lot different without a peak-vally pattern. The cells could be subcultured after 5 d to 7 d and there was 3 to 5 generations depending on the activity of the cells. CCK-8 assay demonstrated that the A values of PASMCs exposed to hypoxia increased after 24 h (P＜0.05) as compared with normoxia. TUNEL result showed that the apoptotic index of the PASMCs in hypoxia decreased after 24 h (P<0.05). CONCLUSION：This technique for obtaining cultured mouse PASMCs is simple, fast, accurate and economical. The digestion time is easy to control. Hypoxia promotes the proliferation and inhibits the apoptosis of PASMCs. 相似文献
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小檗碱和壳聚糖抗蔬菜病原真菌活性测定及复合膜制备 总被引：2，自引：0，他引：2
研究了小檗碱和壳聚糖对几种常见蔬菜病原真菌的抑制活性,以及以小檗碱和壳聚糖为主料制备复合膜的方法,并测定了该膜的药物释放效果。试验表明:低浓度(0.234 mg/mL)小檗碱即可抑制辣椒炭疽病菌(Vermicularia capsici)等5种蔬菜病原真菌的生长。20 mg/mL浓度壳聚糖对番茄灰霉病菌(Botrytis cinerea)的抑制率高达65%,而对其余4种果蔬病原真菌也有一定的抑制作用。为了集成这2种天然化合物的优点,制备了小檗碱-壳聚糖复合膜,该膜具有缓释功能,在模拟外部环境(磷酸缓冲液,pH 6.8)条件下,20 d小檗碱累计释放率接近25%,提示其在果蔬贮藏抗菌中的应用价值。 相似文献
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钾肥在小白菜和萝卜上的施用效果 总被引：6，自引：0，他引：6
采用盆栽试验方法研究了施用钾肥对小白菜、萝卜生长发育、产量、品质及钾素含量的影响。结果表明 ,施用钾肥对小白菜和水萝卜的株高、叶片数无显著的影响 ,但可提高水萝卜块根的产量 ,提高幅度为 31.0 4 %～ 97.93%。施用钾肥可提高小白菜和萝卜的蛋白质和VC含量 ,降低硝酸盐含量 ,增加植株的钾素含量 相似文献
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Fresh onion seeds desiccated to 6.0% seed moisture content (SMC) were stored in various packaging materials under different storage conditions. Seeds packed in aluminum-laminated pouches beside those stored with silica gel at 25 °C maintained satisfactory germinability and vigour after 12 months. Desiccated seeds stored in moisture impervious containers produced more vigourous seedlings. Germination potential of onion seeds increased with reduced SMC besides storage in moisture impervious packets along with desiccants as physiological and biochemical attributes are regulated. Seed viability and vigour decreased with accelerated ageing due to increased lipid peroxidation, decreased activities of several free radical and peroxide scavenging enzymes. Electrical conductance of seed leachates also increased with ageing. Thus, adoption of appropriate storage temperature and moisture control techniques would significantly affect onion seed quality, which was due to minimum accumulation of free peroxide radicals and enhanced activity of free radical scavenging enzymes. 相似文献