2013年山东省棉花种植面积将继续减少——2013年山东省棉花种植意向调查情况

对山东省8个主产棉市2012年棉花生产、棉粮种植效益、2013年植棉意向等进行了详细调查.调查结果显示:2013年山东省植棉面积将继续大幅减少,减幅为12.92％,推测2013年全省植棉面积约60.087万hm2.     

2013年山东省棉花种植面积将继续减少

 对山东省8个主产棉市2012年棉花生产、棉粮种植效益、2013年植棉意向等进行了详细调查。调查结果显示：2013年山东省植棉面积将继续大幅减少,减幅为12.92%,推测2013年全省植棉面积约60.087万hm²。     

中国棉花2010年意向种植面积减少5%

中国农业科学院棉花研究所发布调查报告称，由于植棉收益低且不稳定，2010年全国棉花种植意向面积同比减少4．9％，照2009年植棉面积5030khm^2减至4784khm^2上下。     

2013年度全国棉花种植意向明显减弱

为初步掌握2013年度棉花种植意向情况,中国储备棉管理总公司承建的国家棉花市场监测系统于2012年11月下旬在全国范围展开2013年度棉花种植面积意向调查.样本取自15个省(自治区)、89个植棉县(市、团场)、4493个定点植棉信息联系户.调查结果显示,全国植棉意向面积6751.5万亩,同比减少427.2万亩,减幅6％.各主产棉区的意向情况具体如下: 黄河流域棉区植棉意向面积为2443.1万亩,同比减少8.8％.其中,山东省同比减少4.4％,河北、河南、山西、陕西四省减幅分别为13％、9.4％、31.2％和0.5％.     

湖北省潜江市2014年植棉意向调研报告

通过对湖北潜江棉区棉农植棉意向进行抽样调查,结果表明：2014年潜江市棉花种植面积比上年减少15％以上,并分析了缩减的主要原因,提出了稳定棉花生产的3点建议.     

山东东营市2014年植棉效益与2015年植棉意向调查

<正>为正确分析预测2015年的植棉形势,科学合理引导棉花生产,我们于2014年11月对山东省东营市2014年的植棉效益与2015年的植棉意向进行了调研。1调研方法为保证调研结果的代表性、全面性,每个植棉乡镇调查3~5个典型植棉村,每个植棉村调查5~10个典型植棉户。全市共调查了27个植棉乡镇(街道、办事处),99个植棉村、426个植棉户。每户填表调查其2014年植棉面积、收获子棉数量、已售     

1998年农民植棉意向调查

１９９８年农民植棉意向调查董承稳程军山东省定陶县农委２７４１００１９９８年２月初，对全县农民植棉意向进行了一次详细调查。选择全县过去植棉面积较大、一般、较小３个不同类型共６处乡镇，每乡镇调查３个行政村，每村１０户，共调查１８０户８３７人，８１公顷。调...     

近几年山东省棉花生产情况及稳定发展的对策建议

分析2008-2013年山东省棉花生产发展情况，植棉效益、机械化程度低和政策支持不够是影响棉花生产和农民植棉积极性降低的主要原因。为此提出了加大政策支持、发展现代植棉业等稳定发展山东省棉花生产的对策建议。     

黄河三角洲旱地棉花栽培技术

总结与推广旱地棉花栽培技术，对提高开荒植棉效益，稳定棉花种植面积有重要的意义。近几年，山东省东营市在旱地植棉方面取得了一些经验，现总结如下：1蓄水保墒我市年降水量在597．8mm，这是旱地棉花蓄水保墒的基础，更是保障旱地棉花生长发育的主要水源。保墒的主要措施是，疏松表土，切断毛细管水，抑制蒸发。     

2012年度全国棉花种植面积意向调查

为初步掌握棉花种植意向情况,国家棉花市场监测系统于2011年11月下旬在全国范围展开2012年度棉花种植面积意询调查。样本取自15个省（自治区）、89个植棉县（市、团场）、4493个定点植棉信息联系户。调查结果显示,全国植棉意向面积7294．1万亩,同比减少647．6万亩,减幅8．2％。     

Allelopathy in Agroecosystems in Spain

Summary

This paper reviews the effects of allelopathic interactions in agroecosystems in Spain on plant physiological activity and their ecological advantages. The phenological stage of growth of donor plants and the effective allelochemicals in the soil solution while studying the role of phenolic compounds were highlighting. Finally possible future prospects and conclusions regarding weed control by allelochemi-cals under integrated crop management strategies are discussed.     

Factors in the Reduction in Grain Number in Winter Wheat by Early-Sowing in Yamaguchi

Abstract

Grain number per spike of wheat is lower in early sowing than in the conventional standard cultivation in Yamaguchi, Prefecture, Japan. Components of the grain number per spike in five cultivars were analyzed with respect to temperature during the spike development period throughout three growing seasons 2001/2002, 2002/2003 and 2003/2004 to find the cause of the problem of early sowing cultivation. The plants sown in early-October and late-November were called the early sown group and the standard group, respectively, in the following. Three of the five cultivars, Hokushin, Akitakko and Nanbukomugi, showed a strong winter habit, which requires very cold temperatures for spike differentiation. The other two cultivars, Iwainodaichi and Airakomugi, had a moderate winter habit. Grain number per spike and grain yield were decreased by early-sowing (compare with the standard group) in almost all cultivars throughout the three growing seasons. The three cultivars which had a strong winter habit had fewer spikelets per spike in the early-sown group than in the standard group. The other two cultivars which had a moderate winter habit had fewer grains per spikelet in the early-sown group. The higher the temperature during the spikelet formation phase, which is from flag leaf initiation to terminal spikelet initiation, the higher the number of spikelets per spike in the standard group. The spikelet number per spike in the early-sown group increased with the increase in productive tillers under fertile conditions. Such conditions also increased the grain number per spike.     

Diurnal changes in net photosynthetic rate in potato in two environments

Summary Diurnal changes in net photosynthetic rate were measured in a furrow-irrigated potato crop and in a riverbed crop where the water table was always maintained at 20–28 cm from the soil surface. In the irrigated crop, the photosynthetic rate during mid-afternoon was about half the peak rate observed at noon. This reduction was accompanied by a near tripling of stomatal resistance, a 45% reduction in transpiration, and a 5-fold increase in the difference between leaf and air temperatures. No such changes were observed in the riverbed crop where the photosynthetic rate remained nearly constant at about 0.9 mg m⁻² s⁻¹ between 9 a.m. and 4 p.m. Tuber yield in the riverbed crop was about 30% higher than in the irrigated crop.     

我国干热区甘蔗抗旱植蔗主要问题研讨

我国干热蔗区是我国甘蔗糖业的重要生产基地,蔗区光热资源丰富,唯降水分布不均成为植蔗生产的主要限制因子;根据蔗区植蔗特点和甘蔗需水规律,苗期抗旱是干热蔗区抗旱植蔗的关键,保证较多的总苗数和足够的生长量是苗期抗旱植蔗需解决的关键技术难题,制定相应的苗期抗旱植蔗栽培技术措施是解决该难题的重要保障;该观点为我国干热蔗区植蔗生产、甘蔗引育种提供理论和技术支持。     

棉花体细胞无性系变异的研究进展

体细胞无性系变异是一种重要的细胞工程育种技术,其应用于棉花育种的前提是建立高效的组织培养诱导再生植株体系.本文简要综述了棉花离体诱导植株再生研究的现状,重点讨论了棉花体细胞无性系变异的表现、利用方法及机理,提出了当前研究存在的问题并对今后的研究进行了展望.     

我国高粱育种研究进展

对我国高粱育种的主要途径和研究方向进行了概述,针对目前高粱产量徘徊现象,提出了高粱超高产育种设想,并对其技术路线进行了探讨。     

2009年中国稻米市场分析及2010年展望

以翔实的资料对2009年中国稻米生产、消费、进出口、供求平衡、库存、价格走势、购销政策和国际稻米供求等情况进行了全面地分析,对影响2010年稻米市场价格走势的各种因素进行了深入研究,并在此基础上对2010年我国稻米市场价格走势进行了预测,结论是我国稻米价格仍呈上行趋势。     

Advances in Variable Rate Technology Application in Potato in The Netherlands

Precision agriculture is a farming management concept based on observing, measuring and responding to inter- and intra-field variability in crops. In this paper, we focus on responding to intra-field variability in potato crops and analyse variable rate applications (VRAs). We made an overview of potential VRAs in potato crop management in The Netherlands. We identified 13 potential VRAs in potato, ranging from soil tillage to planting to crop care to selective harvest. We ranked them on availability of ‘proof of concept’ and on-farm test results. For five VRAs, we found test results allowing to make a cost-benefit assessment. These five VRAs were as follows: planting, soil herbicide weed control, N side dress, late blight control and haulm killing. They use one of two types of spatial data: soil maps or biomass index maps. Data on costs and savings of the VRAs showed that the investments in VRAs will pay off under practical conditions in The Netherlands. Savings on pesticide use and N-fertilizer use with the VRAs were on average about 25%, which benefits the environment too. We foresee a slow but gradual adoption of VRAs in potato production. More VRAs will become available given ongoing R&D. The perspectives of VRAs in potatoes are discussed.