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蓐稻老百姓叫“野生稻”,但实际并不是野生稻,有关专家认为,蓐稻是栽培稻的一种退化变种,形似水稻,对水稻危害非常严重。20世纪80年代末开始在海林市传播蔓延,目前已传播蔓延到牡丹江、鸡西、虎林、密山、松花江等黑龙江省东南部地区一近几年,传播速度较快.传播面积较大,危害较重,如果放任不治将会传播蔓延到全省各地,对全省水稻生产带来极大的不利,本文着重介绍了蓐稻的形态及生理特征,并叙述了其传播蔓延的途径及原因,具体阐述了防除蓐稻传播蔓延的措施。 相似文献
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通过1996年-2000年5年来的研究表明:寒地稻水球菌核病主要以菌核在稻茬、土壤中越冬,第2年侵染稻株,引起发病,水稻抽穗期为盛发期;施肥比例不合理,氮肥过多,长期深水灌溉或缺水发病重;不同品种(系)间抗病性有差异;通过室内外试验,25%施保克乳油1125ml/hm^2,于拔节期和抽穗期喷雾,对稻小球菌核病防效达85%以上,且提高产量。 相似文献
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阐述了辽宁省盘山地区水田稻水象甲虫害来源、发生规律、害虫的形态特征、生活习性及危害情况,并进行了灭虫药剂筛选试验。结果表明,采用速克毙、凶象毙、稻乐丰和象甲净等4种农药50ml/667m^2用量。防治一般水田稻水象甲,效果可迭100%。应用生物农药杀确爽50-60ml/667m^2用量,防治养蟹稻田稻水象甲,防治效果在92.3%-94.3%。 相似文献
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随着轻型栽培稻作方式的推广应用,田间杂稻的发生状况逐年加重,很大程度上影响了正常的水稻生产。本文介绍了杂稻的植株性状与稻米品质,对不同土质类型、不同稻作方式及实施同一稻作方式不同年度杂稻发生特点进行了分析,初步探究了杂稻发生的原因,并提出了综合防除技术。 相似文献
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针对沈阳地区水田中后期杂草的发生种类和为害情况,开展药剂品种和剂量筛选试验。结果表明:在水稻分蘖至孕穗期,施用48%苯达松与13%二甲四氯1∶1.67配比混剂,每667m2用混剂150~200ml,能取得93.0%以上较好的灭草效果。 相似文献
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为找出灰黄泥田早稻氮肥最佳施用量 ,降低施肥成本 ,减少水质污染 ,于 1999~ 2 0 0 1年在永州开展了不同施氮量的试验。以无氮肥区为对照 ,在每公顷施用普钙 30 0 kg,氯化钾 15 0 kg为肥底的基础上 ,分别施用尿素态纯氮 6 0 ,12 0 ,180 ,2 40 kg,以金优 40 2为试验材料。结果表明 ,每公顷施纯氮 16 5 kg,可提早分蘖 ,增加有效穗数 ,且可增加株高和穗长 ,施肥量对产量的效应方程为 y =3378.6 30 .97x - 1.15 4x2。 相似文献
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Satoko Yasumoto Natsumi Maki Makoto Kojima Yasuo Ohshita 《Plant Production Science》2017,20(3):279-287
We investigated changes in the developmental duration of rice cultivars with a wide range of maturities in response to late planting. Elucidating the relationship between cropping season and the progress of growth stages is important for establishing direct-seeded cultivation and creating growth models. Late planting of the intermediate to late maturing cultivars Akidawara and Hoshijirushi decreased the time from emergence to panicle formation and decreased the cumulative effective temperature (CET) and cumulative effective soil temperature (CEST). In the very early maturing cultivars Ichibanboshi and Fusakogane, the changes in number of days, CET, and CEST from emergence to panicle formation with late planting were small. From emergence to heading and maturity, the number of days, CET, and CEST of many cultivars tended to increase until mid-May and then decreased. The changes in the number of days, CET, and CEST caused by late planting were greater for the intermediate to late maturing cultivars than for the very early maturing cultivars. The differences between cultivars were greatest with early May sowing, and then decreased with later planting. Short-day condition revealed significant differences in the duration of vegetative growth and CET among cultivars, but long-day condition erased these differences. These results demonstrate that the photosensitivity and thermosensitivity of cultivars are especially important in crop planning and for creating growth models of direct-seeded rice. 相似文献
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报道了触杀型除草剂敌稗结合长效型除草剂噁草丙、杀草丹或胺硝草复合式处理防除旱直播稻田杂草(稗草、丛生千金子、碎米莎草、圆叶牵牛、沼泽生异蕊花的效果。 相似文献
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光生态膜无雾滴、透光度好、能提高棚内温度、可将太阳光谱中作物不能吸收的绿光转变为作物可利用的红光和蓝光。对其进行光能利用率试验研究表明:光生态膜在水稻育苗上应用可提高水稻秧苗素质、产量和经济效益,是水稻育苗的一种新型棚膜。 相似文献
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Victoriano Joseph Pascual 《Plant Production Science》2017,20(1):24-35
Taiwan’s average annual rainfall is high compared to other countries around the world; however, it is considered a country with great demand for water resources. Rainfall along with alternate wetting and drying irrigation is proposed to minimize water demand and maximize water productivity for lowland paddy rice cultivation in southern Taiwan. A field experiment was conducted to determine the most suitable ponded water depth for enhancing water saving in paddy rice irrigation. Different ponded water depths treatments (T2 cm, T3 cm, T4 cm and T5 cm) were applied weekly from transplanting to early heading using a complete randomized block design with four replications. The highest rainwater productivity (2.07 kg/m3) was achieved in T5 cm and the lowest in T2 cm (1.62 kg/m3). The highest total water productivity, (0.75 kg/m3) and irrigation water productivity (1.40 kg/m3) was achieved in T2 cm. The total amount of water saved in T4 cm, T3 cm and T2 cm was 20, 40, and 60%, respectively. Weekly application of T4 cm ponded water depth from transplanting to heading produced the lowest yield reduction (1.57%) and grain production loss (0.06 kg) having no significant impact on yield loss compared to T5 cm. Thus, we assert that the weekly application of T4 cm along with rainfall produced the best results for reducing lowland paddy rice irrigation water use and matching the required crop water. 相似文献
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针对黑龙江省勃利县的自然资源优势,提出依托科技,优化水稻品种结构和区域布局,加大优质米水稻栽培技术示范推广力度、依靠品牌战略,推动优质米水稻产业化生产,发展订单农业,走产、加、销一体化之路等寒地优质米水稻产业化生产措施。 相似文献
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选取闽江河口区稻田为研究区域,对土壤和植物的C、N、P含量及其生态化学计量比进行测定和分析。研究表明:土壤C、N、P元素的变化范围分别为5.72-13.41、0.47-0.82和0.33-0.89 mg.g-1,平均值分别为9.50、0.62和0.56 mg.g-1,其C与N、C与P、N与P的比值分别为12.18-16.39、15.07-24.34和0.92-1.55,平均值分别为15.05、17.88和1.20;植物C、N、P元素的变化范围分别为28.62-38.99、0.65-1.52和0.13-0.32 mg.g-1,平均值分别为35.21、1.19、0.25 mg.g-1,其C与N、C与P、N与P的比值分别为24.54-44.10、94.05-258.93和2.13-10.55,平均值分别为32.11、160.07和5.47。土壤C、N含量低于植物,而P含量却高于植物,C与N、C与P、N与P的比值则表现为土壤低于植物。 相似文献