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黑龙江省九三垦区纸筒育苗移栽甜菜比直播甜菜单产提高26%左右,增糖0.4度,纸筒育苗移栽甜菜面积逐年增加。仅2001年全垦区种植甜菜面积8667hm2,其中纸筒育苗移栽面积5227hm2,占总播种面积60.31%。总收购量达21.56万t,其中多杈根甜菜4.1万t,高青顶甜菜2.8万t,分别占总收购量的19 相似文献
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经1989、1990年甜菜夏季纸筒育苗麦后移栽试验,达到了设计目标,亩平均产量1.7吨,含糖率15.6％。夏季纸筒育苗麦后移栽,表现了叶片生长快、块根膨大快、糖分积累快的生育特点;由于生育期短,气候适宜,青头小、无病虫害且原汁纯度较高,解决了银川地区原料不足、粮糖争地矛盾与含糖率下降、病虫害严重等问题。 相似文献
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泰来县位于黑龙江省西南部,属于寒冷、季节性干旱地区。该县自1989年开始大面积推广甜菜纸筒育苗移栽技术以来,单产最高达27t/hm2,1996年甜菜纸筒育苗移栽面积发展到1630hm2。现将该县甜菜纸筒育苗存在的主要问题及对策简述如下。1存在问题1.1育苗床土选择不当。农户选择的育苗 相似文献
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甜菜雄性不育单胚杂交种甜单304的选育 总被引：3，自引：3，他引：3
甜菜雄性不育单胚二倍体杂交种甜单304,是由单胚雄性不育系TB7-CMS为母本,以二倍体多胚品系甜217-8为父本,按41∶比例杂交而成。2003～2004年参加省区域试验,其结果平均根产量42674.7 kg/hm2,平均含糖率17.48%,比对照品种甜单2号提高12.5%和0.20度。2005年参加省生产示范试验,2006年2月通过黑龙江省农作物品种审定委员会命名。该品种块根丰产性好,含糖率较高,抗褐斑病、耐根腐病。适于机械化播种和纸筒育苗移栽。多点试验表明,该品种适宜种植在黑龙江、内蒙古、新疆等甜菜主产区。 相似文献
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纸筒育苗移栽甜菜能大幅度提高产量,这已在日本甜菜生产实践中得以证实。日本在战前每公顷甜菜产量仅有10余吨,1965年以前亦只限于25吨左右,自1956年增田昭芳博士开始研究“纸筒育苗移栽法”起,由于其增产幅度可达20—30％,便很快运用于生产,至1965年纸筒育苗移栽面积达甜菜总种植面积的20％左右,十年后的1975年达80％左右,这时日本甜菜产量提高到45—50吨/公顷。到1981年,移栽面积己达日本甜菜总面积的93.5％,平均公顷产量达58.5吨。日本在15年内,甜菜单产增加一倍以上,除运用高产杂优品种、有效地防治病虫害和提高施肥水平外,采用纸筒育苗移栽技术是其增产的主要原因。 相似文献
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为探讨内蒙赤峰市北部甜菜产区的防风、保墒、增产、增糖栽培新措施，进行了４种栽培方式试验：纸筒育苗覆膜后移栽、纸筒育苗移栽、直播覆膜栽培、直播（对照）。结果表明，纸筒育苗覆膜移栽甜菜产量、含糖率、产糖量比直播分别提高１５３．５％、０．４度、１６２．４％，每亩农业和工业纯收入居４种栽培方式之首。纸筒育苗移栽甜菜产量、含糖率、产糖量比直播务别提高７５．６％、０．５度、８２．８％，每亩农业和工业纯收入在４种栽培方式中居第二位。直播覆膜栽培甜菜根产量、产糖量比直播分别提高５０．０％、４８．２％，含糖率下降了０．４度，每亩农业和工业纯收入在４种栽培方式中居第三位。 相似文献
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几个糖能型甘蔗新品种高产栽培比较试验 总被引：2，自引：0，他引：2
对近年广西甘蔗研究所选育的桂糖22号、桂引5号、桂糖26号等3个糖能型甘蔗品种进行产量、品质及其主要工农艺性状的研究.结果表明:3个参试品种公顷产蔗量达到能源甘蔗品种120吨以上的技术要求,其中桂引5号产量最高,达171.57吨,公顷,桂糖22号160.90吨忪顷,分别比新台糖22号增产21.7%和14.2%;各品种单位面积可发酵糖量表现与蔗茎产量表现相似,即桂引5号最高,达35.51吨/公顷,其次为桂糖22号,34.75吨/公顷,与对照相比达显著水平.桂引5号、桂糖22号不仅蔗茎产量、单位面积可发酵糖量高,且宿根性强,抗旱,适宜广西旱地甘蔗生产,是理想的糖能兼用品种. 相似文献
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D. Bachtiar S. M. Sapuan A. Khalina E. S. Zainudin K. Z. M. Dahlan 《Fibers and Polymers》2012,13(7):894-898
The effects of chemical treatment on the flexural and impact properties of sugar palm fiber reinforced high impact polystyrene (HIPS) composites were studied. Two types of concentration of alkali solution (4 % and 6 %) and also two types of percentage of compatibilizing agent (2 % and 3 %) have been used in this study. The alkaline treatment is carried out by immersing the fibers in 4 % and 6 % of alkali solution for 1 hour. A 40 wt. % of alkali treated sugar palm fiber (SPF) was blended with HIPS using Brabender machine at temperature of 165 °C. The second treatment was employed by compounding mixture of sugar palm fibers and HIPS with 2 and 3 % of compatibilizing agent using the same procedure. The composites plate with dimensions of 150×150×3 mm was produced by using the hot press machine. The flexural strength, flexural modulus and impact strength of composites were measured and the values were compared to the untreated composites. Improvement of the mechanical properties of the composites has been shown successfully. Alkali treatment using 6 % NaOH solution improve the flexural strength, flexural modulus and impact strength of the composites as amount 12 %, 19 % and 34 % respectively, whereas compatibilizing agent treatment only showed the improvement on the impact strength, i.e. 6 % and 16 % improvement for 2 % and 3 % MAH respectively. 相似文献
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Sugar palm fiber is one of the most abundant natural fibers used in biocomposites. However, prediction of the mechanical properties of such natural fiber reinforced composites is still challenging. Most of the theoretical modelings are based the micromechanical method. There have been little studies involving statistical approach for prediction of mechanical properties of natural fiber reinforced composites. In this study, the tensile properties of short sugar palm fiber-reinforced high impact polystyrene (SPF-HIPS) composites obtained by means of statistical approach were investigated and compared with the experimental observations and with micromechanical models available in the literature. Statistical approach was used to predict the performance of the composite part with different fiber loadings. A two-parameter Weibull distribution function was used to model the fiber length distribution in the composite. For the experimental validation, the composites were prepared by hot compression technique for different fiber loadings (10 %, 20 %, 30 %, 40 % and 50 % by weight). Tensile testing of the composites was carried out according to ASTM D638 to obtain the composites tensile strength and modulus of elasticity. Experimental results showed that the tensile strength of the composite reduced due to the addition of sugar palm fibers, whereas the elastic modulus increased by a factor of up to 1.34. The current statistical model predicted the tensile properties of SPF-HIPS composite close to the experimental values. It was found that statistical approach with standard micromechanical models can be used to predict the mechanical properties of sugar palm fiber reinforced HIPS composites. Hence, this study could assist in decisions regarding the design of natural fiber reinforced composite products. 相似文献
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