共查询到20条相似文献，搜索用时 46 毫秒
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全程化控技术及注意问题 总被引：1，自引：0，他引：1
1应用技术1.1拌种。通过缩节胺拌种能促进种子萌发,提高种子发芽率,出苗早,苗齐苗壮,还可促进幼苗的根系生长。具体方法是,用种子量的0.03%~0.05%缩节胺进行拌种。试验表明种子发芽率比清水(对照)高2%~8%,出苗早1~2天。棉苗出土后,叶色深绿,生长健壮,子叶节高度降低2~3 cm,主根伸长,须根数量明显增多,能达到壮根壮苗目的。1.2苗蕾期。未拌种的棉田可在2~3叶期每公顷用7.5~12.0 g缩节胺兑水225 kg,可有效降低果枝始节高度,促进根系的发育。6~8叶期每公顷用15~22.5 g缩节胺兑水225 g喷施,可有效缩短下部主茎的节间长度,使植株生长稳健,现蕾良… 相似文献
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1材料和方法供试药剂菌立停(上海禾嘉农药有限公司出品);枯必治(成都普惠生物工程有限公司出品),供试棉花品种为新陆早12号。试验在新疆精河县大河沿子镇宽膜高密度棉田进行,试验田前茬为棉花,犁地前每公顷施有机肥15t,磷酸二铵225kg,尿素300kg,4月20日播种,播种前按种子量0.3%和0.03%的敌克松和缩节胺拌种,5月25日苗期每公顷用菌立停、枯必治22.5万倍液及清水(对照)喷施,6月10日现蕾期第二次喷施,7月16日花铃期第三次喷施。喷药时间为棉花苗期、蕾期和花铃期。试验设计为对比排列,重复1次,小区面积为70m×8.9m=623m2。2结果与分析2.1喷施菌… 相似文献
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新疆两种机采模式下的缩节胺调控技术研究 总被引：1，自引：0，他引：1
在新疆奎屯垦区以国审早熟陆地棉品种Z1112为试验材料,采用随机区组设计,设置两种机采模式：（66＋10） cm宽窄行种植模式和76 cm等行距种植模式。分别在棉花子叶期、苗期、蕾期、打顶前3～5 d和打顶后5～7 d 五个时期施用不同剂量的缩节胺,研究不同施药时期和施药剂量对Z1112产量和纤维品质的影响,筛选出适合Z1112品种机采模式的缩节胺调控方法。结果表明,（66＋10） cm宽窄行种植模式下,缩节胺用量在子叶期、苗期、蕾期、打顶前3～5 d和打顶后5～7 d分别为45 g·hm－2、0 g·hm－2、75 g·hm－2、120 g·hm－2、225 g·hm－2时产量和品质最理想;76 cm等行距种植模式下,缩节胺用量在子叶期、苗期、蕾期、打顶前3～5 d和打顶后5～7 d分别为45 g·hm－2、45 g·hm－2、75 g·hm－2、120 g·hm－2、225 g·hm－2时增加产量、提升品质的效果较佳。 相似文献
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以中棉425为材料，2018―2019年设置缩节胺不同用量、不同施用方式处理，探讨长江流域缩节胺运筹对小麦后直播棉产量的影响。结果表明，缩节胺在用量180 g·hm－2于盛蕾期＋初花期（施用比例为1∶2）或盛蕾期＋初花期＋盛花期（施用比例为1∶2∶3）运筹条件下最有利于小麦后直播棉果节的形成和产量提高；产量构成因素分析结果则进一步表明，产量提高是铃数和铃重共同增加的结果。在上述运筹方式下结铃强度高，比对照提高38.0%～47.4%。因此，适宜的缩节胺运筹——用量180 g·hm－2，于盛蕾期（60 g·hm－2）和初花期（120 g·hm－2）或盛蕾期（30 g·hm－2）、初花期（60 g·hm－2）和盛花期（90 g·hm－2）施用有利于小麦后直播棉集中结铃，为集中吐絮和机械采收奠定基础。 相似文献
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棉花蕾期喷施烯效唑增产效应的研究 总被引：3，自引：0，他引：3
棉花蕾期喷施不同浓度烯效唑，结果表明：初蕾期喷施１５～７５ｍｇ·ｋｇ－１烯效唑，能降低棉株高度、主茎节间长度，增加单株铃数、单铃重、衣分，提高棉花产量。其中以喷施６０ｍｇ·ｋｇ－１烯效唑处理增产效果最好，较喷施清水增产皮棉１６１．５ｋｇ·ｈｍ－２，提高１２．６％；较喷施２００ｍｇ·ｋｇ－１缩节安增产皮棉４０ｋｇ·ｈｍ－２，提高２．８％。 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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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
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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