国家甘蔗品种第五轮区试漳州蔗区试验结果评价

在2005-2006年漳州蔗区进行的2新1宿国家甘蔗品种区域试验中,参试的14个国家甘蔗品种在农艺性状方面表现为出苗率较好,分蘖力强,植株高大。对蔗茎产量和蔗糖分进行综合分析,表现最好的品种是MEX105、LCP85-384、闽糖96-1409,这3个品种蔗茎产量高、蔗糖分好;表现较好的品种是闽糖93-730、桂糖96-154、HoCP92-648、HoCP91-556、福农98-1103和云蔗99-596,这6个品种蔗茎产量、蔗糖分和含糖量都比较好;其余品种在各个方面表现一般。     

国家甘蔗品种第五轮区试漳州蔗区2005年试验小结

在2005年漳州蔗区举行的国家甘蔗品种新植区域试验中，参试的14个周家甘蔗品种在农艺性状方而表现为出苗率、分蘖力一般，植株高大，中茎。对蔗茎产量和蔗糖份进行综合分析，表现最好的甘蔗品种是闽糖96—1409、闽糖93—730、MEX105，这三个品种蔗茎产量高、蔗糖分好；表现较好的品种是桂糖96—154、粤糖94—128、HoCP91—556、HoCP92-648、Q170、LCP85—384和福农98-1103，这七个品种蔗茎产量、蔗糖分、公顷含糖量都比较好；其余品种在各个方面表现一般。     

2005-2006年度国家甘蔗品种第五轮区试总结

在2005-2006年漳州蔗区举行的两年新植一年宿根国家甘蔗品种区域试验中,参试的14个国家甘蔗品种在农艺性状方面表现为出苗率较好,分蘖力强,植株高大．对蔗茎产量和蔗糖份进行综合分析,表现最好的品种是MEX105、LCP85-384、闽糖96-1409．这三个品种蔗茎产量高、蔗糖分好;表现较好的品种是闽糖93-730、桂糖96-154、HoCP92-648、HoCP91-556、福农98-1103和云蔗99-596,这六个品种蔗茎产量或蔗糖分和公顷含糖量都比较好;其余品种在各个方面表现一般。     

福建省甘蔗新品种区试( 2005)长泰蔗区试验总结

在 2005年长泰蔗区进行的福建省甘蔗新品种区域试验中,参试的 5个甘蔗品种在农艺性状方面表现为出苗率高,分蘖力、植株高度一般,中茎.对蔗茎产量和蔗糖分进行综合分析,表现最好的甘蔗品种是闽糖 96- 1409、闽糖 93- 730,这二个品种蔗茎产量高、蔗糖分好;福农 98- 1103蔗茎产量高,但蔗糖分较低, LCP85- 384和 CP88- 1762蔗茎产量较低,但蔗糖分比较好.     

国家甘蔗区试品种的丰产性及稳定性分析

对参加第5轮国家甘蔗品种区域试验的14个甘蔗品种的蔗茎产量、甘蔗蔗糖分和公顷含糖量进行丰产性及稳定性分析。结果表明，参试品种蔗茎产量、公顷含糖量存在品种间、年份间和地点间的显著差异，品种、年份与地点的互作效应差异显著；参试品种中云蔗99-596、Q170、Mex105、粤糖94-128、福农98-1103的蔗茎产量比CK2显著增产；Mexl05、HoCP91-555、闽糖96-1409、闽糖93-730、HoCP92-648、CP88-1762、FR93-435等7个品种的蔗糖分优于双对照；Mex105、云蔗99-596、Q170、福农98-1103、闽糖96-1409、HoCP92-648、HoCP91-555等7个品种的公顷含糖量优于双对照。综合分析结果表明：Mex105、闽糖96-1409高产稳产，高糖，公顷含糖量稳定性好，可进一步扩大生产应用；福农98-1103、HoCP92-648平均蔗茎产量高，但表现不够稳定，糖分较高，可在适宜地区推广应用。     

国家甘蔗品种第六轮区试漳州蔗区2009年宿根试验小结

在2009年漳州蔗区举行的国家甘蔗品种第六轮宿根区域试验中,参试的11个国家甘蔗品种在农艺性状方面表现为发株率一般,分蘖力较强,植株高大。对蔗茎产量和蔗糖分进行综合分析,表现最好的品种是桂辐98-296、闽糖95-261、闽糖96-6016,这三个品种蔗茎产量高、蔗糖分较好;表现较好的品种是桂引6号,这个品种蔗茎产量或蔗糖分和公顷含糖量都比较好;福农02-3924、福农99-20169、赣蔗99-591、粤甘18号、云蔗99-91五个品种蔗糖分比对照种高0.5个百分点以上,其余品种在各个方面表现一般。     

甘蔗新品种新植比较试验初报

在 2005年芗城蔗区举行的福建省甘蔗新品种区域试验中,参试的 5个甘蔗品种在农艺性状方面表现为出苗率高,分蘖力、植株高度一般,中茎.对蔗茎产量和蔗糖份进行综合分析,表现最好的甘蔗品种是闽糖 96-1409、 LCP85-384,这二个品种蔗茎产量高、蔗糖分好;其次为闽糖 93-730,该品种蔗茎产量较高、蔗糖分较好;福农 98-1103蔗茎产量高,但蔗糖分较低;CP88-1762 蔗茎产量较低,但蔗糖分比较好.     

国家甘蔗品种第四轮区试漳州蔗区2004年新植试验小结

在2004年漳州蔗区进行的国家甘蔗品种新植区域试验中，参试的12个国家甘蔗品种在农艺性状方面表现为出苗率较好，分蘖力强，植株高火。对蔗茎产量和蔗糖分进行综合分析，表现最好的甘蔗品种是赣南95—108、福农95-1702、福农96—0616和闽糖92—505，这四个品种蔗茎产量高、蔗糖分好、增产增糖较显著；表现较好的品种是云蔗95-128、川引97-1和桂糖94-119，这三个品种蔗茎产量和公顷含糖量都比较好，比对照增产增糖；其余品种在各个方面表现一般。     

国家甘蔗品种第六轮区试漳州点2008—2009年试验表现

参试的11个甘蔗品种在农艺性状方面表现为出苗较好,分蘖力除个别品种较弱外,其余表现良好,植株高大,闽糖95-261、桂辐98-296宿根性强。对蔗茎产量、蔗糖分和公顷含糖量进行综合分析,闽糖96-6016、桂辐98-296蔗茎产量高、蔗糖分较好;桂引6号、闽糖95-261蔗茎产量高,蔗糖分一般;而粤甘18号、粤甘16号、福农02-3924、云蔗99-91、福农99-20169、赣南99-591蔗茎产量一般,蔗糖分好;RB76-5418蔗茎产量一般,蔗糖分低。     

国家甘蔗品种第四轮区试漳州蔗区2004年宿根试验小结

在2004年漳州蔗区举行的国家甘蔗品种宿根区域试验中，12个供试品种总体表现良好。综合各品种的农艺性状和工艺性状，表现最好的品种是福农96—0616、云蔗94—375、粤糖91—1102和福农95—1702，这四个品种蔗茎产量高、蔗糖分好、增糖较显著；表现较好的品种是闽糖92—505、粤农91—600、川引97—1，这三个品种蔗茎产量、蔗糖分和公顷含糖量都比较好，比对照增产增糖；表现较差的品种是粤糖96—244，其余品种在各个方面表现一般。     

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。     

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.     

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。