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黑龙江省是中国大豆生产的最大省份,常年大豆种植面积450万hm2左右,占全国大豆面积的40%~44%.是中国大豆的主要商品粮供应基地。黑龙江省北部高寒区大豆种植面积占全省大豆种植面积1/3左右.大豆种植是该区农民经济收入的主要来源,是该区农村经济发展的支柱产业。 相似文献
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2011年大豆产业发展回顾与展望 总被引:1,自引:0,他引:1
1大豆生产发展状况1.1主产国大豆种植面积和产量世界大豆种植面积比上年略增。2011年度世界大豆种植面积10276万公顷,较上一年增加59万公顷,面积增加主要源于美国和巴西大豆种植面积增加。2011年美国大豆种植面积 相似文献
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东北三省及内蒙古地区是全国大豆种植面积最大的区域。常年种植面积在400万~500万hm2,大豆重迎茬现象十分严重.如黑龙江北部地区大豆重迎茬面积达80%以上。重迎茬大豆减产严重.一般减产10%~20%.严重地块减产30%以上.是妨碍大豆生产发展的重要因素。因此大力推广控制大豆重迎茬减产技术对大豆生产发展具有十分重要的意义。 相似文献
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大豆有效营养面积研究进展 总被引:1,自引:0,他引:1
2001~2004年,运用作物有效营养面积理论,对北方垄作区大豆垄幅的合理性问题进行了试验研究。研究表明大豆主产区黑龙江省中部、南部地区大豆有效营养面积为2210~4500 cm2,有效株行距为47.0~67.1 cm。其中中部地区的有效营养面积在2210~4025 cm2,即有效株行距为47.0~63.0 cm,南部地区的有效营养面积在3838~4500 cm2,即有效株行距为61.9~67.1 cm。南部地区品种有效营养面积较大,中部地区品种有效营养面积较小。据此阐明目前生产上广泛采用67~70 cm的垄作,已超过了大豆的有效株行距,造成了土壤资源等的浪费。尤其是中、北部垄作区采用55 cm左右的垄距种植大豆,将会更有利于大豆群体产量的提高。该理论为目前黑龙江省北部地区栽培面积逐渐增大的大豆窄行垄栽培提供了有力的理论根据。 相似文献
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北部高寒地区耐重迎茬大豆品种的筛选 总被引:1,自引:0,他引:1
北部高寒地区耐重迎茬大豆品种的筛选张雷刘英华闫洪睿郭儒东刘发(黑龙江省农科院黑河农科所·黑河市,164300)黑龙江省北部高寒地区是我省早熟大豆产区,目前已成为我省重要商品大豆生产基地之一。近年来,由于市场经济的发展,市场的强大拉力,使我省大豆面积迅... 相似文献
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黑龙江省北部高纬寒地总播种面积约2000万亩左右(包括新开荒地约200万亩),大豆播种面积1000万亩左右,占播种面积的50%左右,约占黑龙江省大豆种植面积的14,相当于吉林及辽宁两省大豆种植面积的总和,是我省及国家有很大发展潜力的优质商品豆基地。但... 相似文献
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W. L. Porter 《American Journal of Potato Research》1967,44(10):382-382
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Effects of timing and rate of N fertilizer application on concentrations of P, K, S, Ca, Mg, Na, Cl, Mn, Fe, Cu and Zn in herbage from perennial ryegrass/white clover pastures were studied at two sites in south-western Victoria, Australia. Nitrogen fertilizer (0, 15, 25, 30, 45 and 60 kg ha–1 ) was applied as urea in mid-April, early May, mid-May, early June and mid-June 1996 to pastures grazed by dairy cows. At Site 1, N fertilizer resulted in a linear increase in P, K, S, Mg and Cl concentrations in herbage and a linear decrease in Ca concentration. For all times of application, concentrations of P, K, Ca, Mg and Cl in herbage increased by 0·0048, 0·08, −0·010, 0·0013 and 0·053 g kg–1 dry matter (DM) per kg N applied respectively. For S concentration, maximum responses occurred in mid-May (0·012 g kg–1 DM per kg N applied). At Site 2, N fertilizer resulted in a linear increase in P, S and Na concentrations in herbage, a linear decrease in Ca concentration and a curvilinear increase in K and Cl concentration. The maximum responses for P, S and K concentrations in herbage occurred for the N application in mid-June and were 0·015, 0·008 and 0·47 g kg–1 DM per kg N applied respectively. For Cl concentration, the maximum response occurred for the N application in early June and was 0·225 g kg–1 DM per kg N applied. Overall, applications of N fertilizer up to 60 kg ha–1 did not alter herbage mineral concentration to levels that might affect pasture growth or animal health. 相似文献
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Krishna Kumari S Thayumanavan B 《Plant foods for human nutrition (Dordrecht, Netherlands)》1998,53(1):47-56
Scanning electron microscope (SEM) pictures of small millet starch granules showed more large polygonal and few small spherical or polygonal granules. The granules of small millets resembled those of rice starch granules. The size of the starch granules ranged from 0.8–10 m. The size of the granules was larger in barnyard millet and smaller in proso millet. Several granules showed deep indentation caused by protein bodies. SEM of starch isolated from 24 hour-germinated kodo millet showed pitting or pinholes at some points due to the attack of amylases (preferentially on bigger granules). Brabender viscoamylograph studies on small millet starches revealed that the gelatinization temperatures ranged from 75.8 to 84.9 ° C. Barnyard millet possessed lower amylograph viscosity, minimum breakdown, and relative breakdown values when compared to the other small millets. 相似文献