特早熟抗病高产棉花新品种——辽棉27号

辽棉27号是辽宁省农科院经济作物研究所于1997年以特早熟、抗病、高产、耐低温品种辽棉16号为母本,以高衣分、优质棉花品种sGK321为父本杂交,其后代在人工枯黄萎病圃经过14年的定向筛选改良培育出的特早熟、抗病、高产、优质棉花新品种.2012年12月通过辽宁省农作物品种审定委员会审定(辽审棉[2012]29号).     

选择方法是棉花杂交育种成败的关键

建国以来,我所曾先后选育出辽棉三号、辽棉四号和抗萎品种辽棉五号等新品种。这几个新品种,在正常年的一般生产条件下,每亩皮棉产量比关农一号提高1—2倍,亩产皮棉可达100—150斤。同时,也提高了     

杂交棉辽棉22号的选育及栽培要点

辽棉22号是辽宁省经济作物研究所杂交棉课题组通过陆地棉品种间杂交选育的杂交棉新品种。2000年组配组合,2005年定系号为辽杂02—12,2006—2007年参加辽宁省棉花区域试验和生产试验,2008年通过辽宁省农作物品种审定委员会审定,审定编号：辽审棉[2008]25号。     

麦套棉品种筛选试验结果及应用范围

麦套棉品种筛选试验结果及应用范围高宪彩，李川豫山东省定陶县农业局２７４１００为解决棉麦一体化栽培中棉花品种的选择，定陶县在往年棉花品种试验中推选中棉所１４、中棉所１６、中棉所１７、鲁棉１０号、辽棉９号、１９８、中棉所１２、２０７、石选１４共９个品种（...     

特早熟抗病高产棉花新品种——辽棉31

<正>辽棉31是辽宁省经济作物研究所于1997年以特早熟、抗病、高产、耐低温品种辽棉16号为母本,以优质、高衣分河北资源97-3155为父本杂交,其后代在人工枯黄萎病圃经过16代的定向筛选改良培育出的特早熟、抗病、高产、优质棉花新品种。2014年12月通过辽宁省农作物品种审定委员会审定(审定编号:辽审棉2014002)。1特征特性辽棉31生育期128d左右,霜前花率91.0%,     

宇优棉一号特征特性及配套技术

宇优棉一号由安徽宇顺种业公司用(泗棉3号×海7124)×(湘棉13×辽棉9号)的后代经过多年多点选择、鉴定选育而成的一个优质棉新品种.2007年2月通过安徽省棉花品种审定委员会审定.     

辽棉品种在内蒙古阿拉善盟试验示范效果分析

2013年安排了10个品种（系）在内蒙古阿拉善盟的左旗和额济纳旗进行试验,并安排辽棉27在阿左旗进行示范种植2hm2。通过试验示范看,辽棉15、辽棉23适宜阿左旗和额济纳旗种植,辽棉25适宜在阿左旗种植,辽棉27可以在内蒙古阿左旗推广种植。上述品种的第一果枝高度均符合机械化收获的要求。     

特早熟棉花新品种——辽棉14

特早熟棉花新品种——辽棉１４刘少明杨桦辽宁省经济作物所１１１０００特早熟棉花新品种辽棉１４号，是辽宁省经济作物科学研究所于１９８４年以早熟品系辽６９２为母本，以抗枯、黄萎病品系辽１０３８为父本杂交，经过多年定向选择培育而成。于１９９６年经辽宁省品种审...     

全国特早熟棉第10轮区试述评

一、试验概况1990～1991年为特早熟棉第10轮区域试验,它包括常规品种、抗病品种和低酚棉品种。常规、抗病品种4个:太995、锦2148、辽3702和辽8066,以晋棉5号为统一对照,设试点8处。低酚棉品种4个:辽无2152、辽     

高产优质新品种新陆早57号选育及栽培技术

新陆早57号是新疆农业科学院经济作物研究所以自育高代品系60—2[新陆早17号（9908）×辽棉16（辽205）]为母本、新陆早8号为父本杂交，经南繁北育、田间及自然病圃鉴定筛选而成。2010年申请参加新疆维吾尔自治区早熟棉花品种预备试验，2011—2012年参加自治区早熟棉品种区域试验及生产试验，2013年7月通过新疆维吾尔自治区农作物品种审定委员会审定。     

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.     

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.     

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.     

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。     

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.