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1.
1土地准备
1．1选地、整地、基肥
应选地势较高，排灌方便，至少与瓜类、十字花科蔬菜间隔3年以上的肥沃地块，前茬以禾本科作物的沙壤土为最好。4月中旬，结合整地施足基肥，以腐熟有机肥为主，辅助适量化肥，一般施腐熟有机肥60000～75000kg/hm^2，过磷酸钙750kg／hm^2，硫酸钾300～375kg／hm^2，尿素75kg／hm^2。有机肥要全面撒施，化肥集中沟施。 相似文献
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1施足基肥,深耕整地
在灌底墒水后,土壤适墒时,结合翻地撒施优质农家肥施3．8万～4．5万kg／hm^2,尿素150kg／hm^2,磷酸二铵225k／hm^2,翻后磨平,精细整地,做到土地平整,土粒松碎,田间清洁,墒度高。 相似文献
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春花生地膜覆盖具有增温、保墒抗旱、促进早苗全苗、早花多果等优点,地膜覆盖技术如下:1选好土地选择土层深厚、土壤质地疏松、肥力中等以上,保水、保肥、向阳、透气性好的地块。2选用良种选用直立型或半直立型的高产良种,如白沙17号,鲁花系列,豫花系列等。3精细整地精耕细耙后,做成畦宽60～80cm,沟宽25～30cm,畦高10～15cm,上松下实的播种畦。一般每亩播8000穴左右,每穴2～3粒种子,播种前喷“拉索”除草剂。4施足基肥一次性用优质农家肥4000～5000kg,过磷酸钙40～50kg,硫酸钾8～10kg,标准氮肥20～25kg。5播种盖膜比露地栽培提高10～13d播种… 相似文献
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绞股蓝是葫芦科的一种多年生落叶草质藤本宿根植物，由于它含有丰富的4种人参皂甙，营养物质丰富，能与人参蓖美，称“南方人参”，因而引起人们极大的兴趣和重视。为了提高绞股蓝单产，我所进行了4年试验，初步探索出绞股蓝亩产干品250kg高产栽培技术，现简报如下：1施足基肥，多施氮肥、磷肥、锌肥，增施有机质肥耕整大田前，先亩施有机质堆肥6000kg／亩、磷肥（过磷酸钙）30kg，锌肥3kg。将上述肥料均匀撒入田中后，耕翻开沟整地，弄平开畦，每畦宽14cm，沟宽40cm，觉行60cm，窄行30cm，株距2Zcm，亩栽7400棵。2适时播种开春后地温达7℃… 相似文献
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寒地甘草栽培技术 总被引：2，自引：0，他引：2
薛云周希双高玉环黑龙江省龙江县种子管理站 《中国农学通报》2003,19(2):167-167
甘草具有抗寒、抗旱、喜光、耐热的特点.是抗盐性很强的植物,适宜于土层深厚,排水良好地下水位较低的砂质土壤栽种. 1 造地整地 一般土壤以pH 8的微碱性为宜,秋季深翻30～45 cm,施足基肥,施有机肥30000～45000 kg/hm2.翻后细耙整平,起60 cm宽垅或作成高畦. 相似文献
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1精细整地适时播种
黑糯玉米是高肥作物,需肥量大,应选择排灌便利,肥力中上,沙壤土田块.水稻田提前20d深翻晒白促使土层疏松,施足基肥再犁一次随即整地成畦.基肥用猪牛栏粪200担/667m2,碳铵50kg/667m2,过磷酸钙30kg/667m2,硫酸钾10kg/667m2,堆沤,腐熟后,全层深施. 相似文献
9.
1 选地、整地
选择土层深厚、有机质含量高、排灌方便的壤土或砂壤土地块作为采种田。在采种田周围1000m范围内，不能种植其他南瓜及西葫芦品种。
施入优质腐熟的有机肥4000～5000kg／667m2，深翻耙平。在种植前父本区按70～90cm做畦。母本区做大小畦：小畦宽40～60cm，高10cm；大畦宽1．8m，畦长7～10m；做好排灌渠道。定植前3～4d，于定植穴所在位置开沟，施入三元复合肥30～40kg／667m2(如有机肥不足需施用100kg)，然后将沟填平，等待定植。…… 相似文献
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T. McNeilly 《Euphytica》1982,31(1):237-239
Summary A method for rapid screening of large numbers of barley genotypes for aluminium tolerance is described, and the results of a small scale screening of composite cross CC XXX-C given. 相似文献
13.
一项能够取得品种权的植物新品种,必须同时具备以下几个条件:属于国家植物新品种保护名录范围;不违反国家法律、妨害公共利益或者破坏生态环境;必须具备新颖性、特异性、一致性和稳定性;应当具备适当的品种名称.另外,品种权是不能自动取得的,即使合乎授权条件的植物新品种,也必须履行<中华人民共和国植物新品种保护条例>(以下简称<条例>)和<中华人民共和国植物新品种保护条例实施细则>(以下简称<实施细则>)所规定的品种权申请程序.为了减少品种权申请的盲目性,节省品种权申请人和植物新品种保护办公室双方的人力、物力和财力,品种权申请人在提出申请以前一定要做好以下准备工作. 相似文献
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Sarah E. Lyons Zhehan Tang James Booth Quirine M. Ketterings 《Journal of Agronomy and Crop Science》2019,205(2):248-261
Forage double cropping can increase production, reduce erosion risk and improve soil health. Farmer experience in the north‐eastern USA shows that winter cereals can, in 3–4 weeks (Feekes 9 harvest), produce high quality forage given sufficient N at dormancy break. Here, we evaluate crop response models to determine the most economic rate of N (MERN) for forage winter cereals. Sixty‐three on‐farm N‐rate trials (0, 34, 67, 101, 135 kg N/ha) were conducted in New York from 2013 to 2016. Trials were divided into four categories: (a) no yield response to N (group 1; 20 trials); (b) yield plateau exceeded the highest N rate (group 2; one trial); (c) the MERN was below the lowest N rate (group 3; seven trials) and (d) all other N‐responsive trials (group 4; 35 trials). For group 4, three statistical models were compared (quadratic plateau, exponential and square root plateau). Statistical, environmental and economic criteria showed that the quadratic plateau fits the data best and had the most stable predictions across scenarios. The four‐category analysis is effective in determining MERNs of individual trials, and the quadratic plateau is best for determining forage winter cereal MERNs and yields at MERNs for individual trials in the north‐eastern USA. 相似文献
15.
ZHANG Zhi-liao 《保鲜与加工》2005,(8):149-153
Migration for the reason of zoological environment is the measure for solving the crisis of zoological environment. Nowadays, governments play the chief role in the Migration for the reason of zoological environment, but the migration themselves do not have the freedom to decide whether migrate or not. Because the activity of migration is related to the restraint of economy, culture, law, etc. It is the object of migration that protect the zoological environment and improve the welfare of habitant, which must be concerned when constructing the systems of migration. This paper proves the possibility of contracting for migration based on the methodology of the cost-income analysis. On the other hand, it also argues for changing the mode of migration from that controlled by governments to being decided by habitant themselves. 相似文献
16.
A new method for screening wheat for boron tolerance has been developed to overcome the problems of methods used in the past.
Seedlings were grown for 10 days while suspended over B-rich solutions. Their root lengths were then measured as an index
of tolerance. Five varieties of wheat were screened at seven concentrations of B. Results were obtained more quickly and easily
than from the alternative methodologies and compared favourably. Screening of 128 doubled haploid lines from a cross between
Halberd and (Wl*MMC) suggested that transgressive segregation had occurred.
This revised version was published online in August 2006 with corrections to the Cover Date. 相似文献
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D. L. Jennings 《Euphytica》1979,28(3):747-750
Summary When grown in Scotland, eight blackberry cultivars of diverse origin showed considerable variation in the dates when their first fruits ripened. These dates were determined in part by variation in the date of their first open flower and in part by variation in the number of days required from flowering to ripening. Genotype x environment interactions were important for both components, but especially for the second, where they could be attributed to heterogeneity of regressions against the environmental means. Temperature was considered the important environmental factor determining the number of days required from flowering to repening, and accumulated heat units successfully quantified the differences between cultivars for this component: cultivars required similar numbers of heat units in each season and there were no interaction effects. Heat units were not useful for study of flowering dates, however.The implications for breeding early ripening cultivars for Scotland are discussed. 相似文献
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EDWARD NISSAN 《Growth and change》1994,25(4):411-426
ABSTRACT The construction of a composite index is described to rank U.S. metropolitan areas for educational attainment. The suggested methodology departs from traditional rank sum methods in that this approach utilizes data resulting in a continuous scale, whereas in the rank sum method, no use is made of the actual values of the data, but merely their rankings. The proposed index circumvents several practical problems because the numbers generated are metric measures allowing the use of arithmetic and statistical operations. Data used are pupil/teacher ratio, an effort index, and academic options in higher education. Comparisons are made across areas by population size and by geographic region. 相似文献
19.
1 症状1.1 缺氮 :幼苗矮化 ,瘦弱 ,叶丛黄绿。生长株从叶尖开始变黄 ,沿叶片中脉发展 ,叶片上形成一个“V”形黄化部分 ,致全株黄化 ,后下部叶尖枯死且边缘呈黄绿色。缺氮严重或关键期缺氮 ,果穗小 ,顶部籽粒不充实 ,蛋白质含量低。1.2 缺磷 :嫩株敏感 ,植株矮化 ,叶尖、叶缘失绿呈紫红色 ,后叶端枯死或变成暗紫褐色。根系发达 ,雌穗受粉受阻 ,籽粒不充实 ,果穗少或歪曲。1.3 缺钾 :下部叶片的叶尖、叶缘呈黄色或似火红焦枯 ,后期植株易倒状 ,果穗小 ,顶部发育不良。1.4 缺钙 :植株矮 ,新叶生长受阻 ,新叶尖端几乎完全失绿 ,分泌透明… 相似文献
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In the study on finding a group of inital values for solving operator equation x=G(x)by the two-sided iterative method,some stronger conditions forG(x)have been demandedand some new parameters have to be introduced since 1978,But,as it will be proved in this paper,Itis unnecessary to use any new parameters and other stronger conditions to get a group of initial val-ues of two-sided iterative, as those initial values can be obtained by means of an auxiliary iterativebeginning with operator G(x)itself. The numerical example in this paper illustraves that the methodproposed in this paper is a general method. 相似文献