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1 品种选择
结球甘蓝是十字花科、芸薹属植物,为甘蓝的变种,又名卷心菜、洋白菜、圆白菜、包心菜、莲花白等,为二年生草本,生产上可选用抗病性强和适应性广的优良品种,如黔甘1号、黔甘3号、西园3号、中甘8号、中甘11号、京丰1号、中甘15号、中蔬4号、夏光、牛心甘蓝、春丰、秋丰、晚丰、庆丰、报春和黄苗等,具有被粉霜、耐寒、抗病、适应性强、易贮耐运、产量高、品质好等特点. 相似文献
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几种芸薹属作物的温汤浸种试验 总被引:1,自引:0,他引:1
以秦白2号、秦白3号白菜,秦甘70甘蓝,陕油8号、陕油10号和甘杂1号油菜品种为试材,进行了温汤浸种时间和晾干试验,结果表明:白菜、甘蓝、油菜不同作物对温汤的耐受力不同,白菜比较耐温汤,而油菜不耐温汤;同一作物,不同品种耐温汤也有差异,白菜中秦白2号较秦白3号耐温汤,油菜中陕油8号和陕油10号较甘杂1号耐温汤.对白菜和甘蓝品种来说,温汤浸种的最佳时间应是5~10 min,超过10 min其发芽率明显降低.对油菜品种来说,温汤浸种的最佳时间应是5min.因此认为,对于种皮较薄的十字花科作物等不提倡温汤浸种,而取代以药剂处理比较好. 相似文献
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"昆甘2号"是原昆明市农业科学研究所选育的中晚熟甘蓝一代杂交种,其外叶浅灰绿色,叶球扁圆紧实,丰产,品质优良,冬性强,单球重可达4kg.以往,"昆甘2号"主要在11月初播种育苗作春甘蓝栽培.只要品种选择适宜,云南特别是滇中地区,甘蓝可露地周年种植,但反季栽培特别是夏季栽培的品种多为"中甘11号"、"8398"、"昆甘1号"等.这些品种均表现优良,除"昆甘1号"外,主要为省外或国外所培育,且反季栽培的产量还可被新品种突破.经过试验研究,在滇中各地,"昆甘2号"作夏秋甘蓝栽培亦表现优良,不仅品质佳,其产量也很高,可达5 500 kg/667m2以上.对十字花科蔬菜栽培淡季的调节和菜农的增收起到了良好的作用. 相似文献
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作者引进多个甘蓝新品种进行品种比较试验,通过比较其生育期、丰产性、抗病性、商品性等性状,以期筛选出适宜在衡阳地区秋季种植的甘蓝品种。试验结果表明,19Q6、19Q7、19Q10、19Q12、19Q14、19Q16、19Q27为圆球形甘蓝,虽然产量低,但早熟、品质优、单球小、口感脆嫩、外形美观,深受消费者欢迎,市场售价高,种植效益高;19Q18、19Q19、19Q20、19Q21、19Q22、19Q23、CMS京丰1号、17Q1016、中甘101、中甘105、中甘106为扁球形甘蓝,属中晚熟品种,综合性状表现好,生长整齐,产量高,品质优。以上甘蓝品种可在衡阳地区大面积推广种植。 相似文献
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The Amur tiger, a flagship species of the boreal forest ecosystem in Russian Far East and northeastern China, has declined dramatically in population and geographic distribution due to human caused habitat fragmentation and poaching over the past century. The fate of this largest feline species will also be influenced by the worsening impacts of climate change. In this paper we assess the possible effects of climate change (three scenarios from the 2007 IPCC Report) on the Amur tiger by integrating species distribution modeling (SDM) and population viability analysis (PVA). We projected the potential and realized suitable habitat distributions to examine the impacts from anthropogenic factors, and evaluated the changes of suitable habitat and extinction risk for 100 years under climate change. The realized suitable habitat was projected to be more severely fragmented than the potential suitable habitat because of human-related factors. The potential suitable habitat would expand northward under all climate change scenarios considered. However, the tiger population would suffer the largest decline and highest extinction risk in the next 100 years under the worst climate change scenario (A1B) even though the size of potential habitat would be greatest. Under climate change, the tiger population could persist for the next century only if the size and quality of current habitat patches would remain intact. In addition, our study demonstrated that using SDM alone could grossly overestimate the geographic distribution of the Amur tiger, and that coupling SDM and PVA could provide important insights into conservation planning to mitigate the effects of climate change. 相似文献
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P. B. Flegg 《The Journal of Horticultural Science and Biotechnology》2013,88(2):145-148
The yield results of six field experiments with bulb onions are presented and it is concluded that : (1) The total yield of ripe bulbs increased with increasing number of plants per sq. ft. until an optimum was reached and thereafter the yield declined. (2) At the optimum plant densities for total yield the bulbs were too small for normal market purposes but were of a suitable size for pickling whole. (3) Some varieties of onion would not produce large bulbs even when grown at low plant densities; thus the choice of varieties for ware bulb production is of paramount importance. (4) The fitting of a mathematic model to the density/yield data showed that if varieties were ranked for yield at anyone plant density this ranking would remain the same at all other plant densities. Absolute yield differences between varieties were, however, greatest at low plant densities. (5) Decreasing the distance between rows at a given plant density increased the total yield of bulbs. At 7 plants per sq. ft., a density suitable for commercial dry bulb production, reducing the row spacing from 18 in. to 9-12 in. increased yield by 10 to 30%. 相似文献
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黄瓜断根嫁接方法和嫁接苗出圃标准的研究 总被引:1,自引:1,他引:0
以津春2号黄瓜为接穗,黑籽南瓜、超丰抗生王为砧木,分别以不同插入基质深度(1,2,3 cm)、不同切面长度(0.4,0.8,1.2 cm)、不同地上部高度(3,4,5 cm)处理进行断根嫁接,研究不同断根嫁接方法对嫁接苗成活率和生长的影响.研究结果表明.插入基质深度1~2cm、接穗切面长度0.8 cm左右、地上部砧木高度3 cm左右适合黄瓜断根嫁接. 相似文献
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