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2010年在桃源对准两优608、谷优明占、广占63S/1128、Y两优25等4个新组合进行了引种试验示范,结果表明准两优608和谷优明占表现抗高温和耐低温,较抗稻瘟病,产量较高,在山、丘、平区种植均较适宜,在桃源县可以作为主推组合种植;广占63S/1128生育期偏长,且两段灌浆明显,秕粒多,需继续示范;停止示范Y两优25。 相似文献
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鄂玉17是湖北省恩施州天池山农科所1998年冬在海南配制的玉米三交种,组合为(18611×4824)×Y8G61-512.该品种需≥10℃积温2760℃·d,属中晚熟玉米品种.各级试验示范结果表明:鄂玉17比选育地现有主推玉米品种增产3%~20%,具有增产潜力大、品质优、抗多种病害和适应性强的特点.该品种适宜在湖北省二高山区、低山区及武陵山区适应区种植,单作密度为每公顷5.25万~6.00万株,套作密度为每公顷4.20万~4.80万株.该品种制种产量高,制种父母本行比为1:6。 相似文献
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选育丰产、抗倒、抗病、适宜当地种植的大麦新品种是大麦种植示范和推广的先决条件。本试验选用来源于浙江省3家育种单位的7个大麦新品种,在8个县(市)进行产量和适应性试验,同时对参试品种进行赤霉病和条纹病抗性鉴定。结果显示:浙11-056产量位居第一,比对照花30增产7.0%,在所有试验点均表现增产,其整齐度好、抗倒伏、抗赤霉病和条纹病。因此,浙11-056可在浙江省大面积示范推广。 相似文献
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三七综合栽培技术是在常规种植三七的基础上应用一些新技术、新措施来规范其栽培的一种方式。为探索这种方式对栽培三七的适应性 ,先后在不同地区类型进行了试验示范。通过 3年的试验示范 ,这种方式栽培 ,不仅提高了三七的产量和内在质量 ,而且还降低种植成本 ,通过试验示范初步摸索出一套三七规范化栽培技术 ,为三七规范化栽培 (GAP)奠定了基础 ,现已在三七产区进行大面积推广应用。1 材料与方法1 .1 试验示范点的布局根据课题要求和结合产区三七生产实际 ,试验示范主要安排在主产三七的文山、砚山以、马关三个县 ,种植三七最适宜地区… 相似文献
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《Journal of Crop Improvement》2013,27(2):415-432
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. 相似文献
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《Plant Production Science》2013,16(2):189-198
AbstractGrain 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. 相似文献
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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. 相似文献
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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. 相似文献
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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。 相似文献
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Corné Kempenaar Thomas Been Johan Booij Frits van Evert Jean-Marie Michielsen Corné Kocks 《Potato Research》2017,60(3-4):295-305
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. 相似文献