玉米品种的审定公告探析

通过对吉单88玉米品种的国审公告及一些玉米品种审定公告相关联的分析．指出玉米品种审定公告中存在的欠缺和不足．并提出了对玉米品种审定公告和国家现行的农作物品种审定制度的改革建议。     

隆平高科水稻绿色通道2016—2021年审定品种分析

综合分析了隆平高科自水稻绿色通道品种试验以来审定品种的数量变化、品种类型、主要亲本、产量、抗性以及米质等基本情况。结果表明，隆平高科水稻绿色通道品种审定数量位居同期企业之首；审定杂交稻占比远大于常规稻，其中以两系杂交稻品种为主；审定品种亲本持续更新；审定品种的平均产量相对稳定，抗性和品质显著提升，绿色优质品种快速增加。高产、绿色、优质新品种的审定对保障国家粮食安全生产意义重大。     

2011年广东省审定通过的大豆品种简介

广东省农作物品种审定委员会第三十五次农作物品种审定会议,审定通过作物品种50个,现将审定通过的大豆品种华夏2号简介如下。审定编号:粤审豆2011001品种名称:华夏2号大豆选育单位:华南农业大学农学院品种来源:桂早1号/巴西     

我国水稻品种审定回顾与分析

简要回顾了我国农作物及水稻品种审定历史,阐述了我国农作物及水稻品种审定标准,分析了我国审定水稻品种的数量变化、类型分布、主要性状表现和推广应用情况,并对有关问题进行了探讨。     

2010年农业部大豆主导品种及栽培技术（Ⅱ）

黄淮海地区 1冀豆17品种来源：Hobbit&;#215;早5241。审定情况：2006年4月通过河北省农作物品种审定委员会审定,2006年8月通过国家农作物品种审定委员会审定。     

改革品种区试和审定 促进种子产业化发展

本文阐述了农作物品种区试和审定工作的重要性,剖析当前福建省品种区试和审定工作中存在一些有待改进和加强的薄弱环节,提出改革和加强品种区试和审定工作的思路与对策.     

特籼占25

特籼占25由广东省佛山市农业科学研究所选育而成,亲本组合为特青2号／粳籼89。1998年广东省农作物品种审定委员会审定,1999年海南省农作物品种审定委员会审定。2001年通过国家品种审定委员会审定,国审编号：国审稻2001021。     

国家级茶树品种介绍①

品种是重要的生产力,对农业生产的发展有着至关重要的作用。为了防止劣种传播,给农业生产造成损失,国家十分重视品种的管理工作,1980年成立了全国农作物品种审定委员会,下设包括茶树在内的14个专业委员会,分别负责各作物的品种审定、管理工作,并制定了相应的法规,明确规定“未经审定或审定不合格的品种不得繁殖,不得经营、推广,不得宣传,不得报奖,更不得以成果转让的名义高价出售。”最近,茶树专业委员会对一批申报审定的茶树品种进行了审查评议,通过了25个品种为首批国家审定品种。为了便于生产单位和茶农选用,兹将这25个     

农作物品种审定推广中存在的问题及对策

本文从农作物品种审定制度、品种试验、品种选育和推广等多个角度指出当前品种审定推广过程中存在的问题,较全面地分析了问题存在的根源。在广泛调研的基础上,提出了品种审定制度改革、提高承试人思想业务素质、完善试验点配套设施和规章制度、提高育种人责任意识和育种理论技术水平、良种良法配套推广等解决问题的基本途径与有效对策,对于推进现行的农作物品种审定与推广工作具有重大的促进作用。     

1979～2020年我国玉米品种审定情况回顾与展望

1979～2020年全国31个玉米品种审定委员会累计审定玉米新品种17 127(个)次,去除同一品种不同省份重复审定,统计得到14 121个审定品种.郑单958、中单9409等7个品种审定10次以上;山东登海种业股份有限公司、北京市农林科学院玉米研究中心等6个单位审定品种超过100个;昌7-2、吉853等5个自交系育成...     

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.