共查询到19条相似文献,搜索用时 500 毫秒
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通过分析湖南省安乡县棉花生产存在的节能减排问题,如耕作制度单一、棉花种植密度过小、病虫害防治与肥料施用存在着盲目性、农田水利建设滞后、棉地污染现象严重等,提出了安乡县棉花生产的节能减排建议,如加强农田水利建设、改革棉田耕作制度、增加种植密度、科学防治病虫害、合理施用肥料、节约用种、搞好抗灾补损等。 相似文献
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苏北沿海地区棉花生产现状分析与出路思考 总被引:6,自引:5,他引:1
根据苏北沿海棉区近五年来的棉花生产情况,分析了棉花生产中田闽管理放松、生产成本投入减少、种植成本增加、棉花收购遇冷落、植棉效益下降、棉农信心不足等突出问题及其政策不再支撑、市场疲软、价格低而不稳、自然灾害频繁发生、病虫害日益加重等主要原因,提出发展棉花生产的出路应采取政策支持棉花、政府关注棉花、良补倾斜棉花、价格保护棉花、托市收储棉花等措施。 相似文献
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分析了甘肃省敦煌市棉花生产的现状与存在的问题,指出采取选用优质品种、搞好平衡施肥、适时播种、搞好调控技术与病虫害防治、定期适时采摘等高产栽培措施.提出以市场要求指导棉花种植、优化品种布局、加速原种基地建设、改进栽培技术与原棉加工技术、加快棉花流通体制改革等建议. 相似文献
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为了探讨施肥及耕作技术集成对木薯地土壤理化、生物性状及木薯产量的影响,本试验共设置5个处理,分别是生物有机肥+测土配方肥+盖膜集雨水+深耕(处理1)、生物有机肥+测土配方肥+盖膜集雨水(处理2)、生物有机肥+测土配方肥+深耕(处理3)、生物有机肥+测土配方肥(处理4)、施通用高浓度复合肥(处理5常规施肥及种植方式作为对照),通过大田试验研究他们对木薯地土壤理化、生物性状及木薯产量的影响。结果表明:与常规施肥及种植方式相比,不同施肥及耕作栽培技术集成处理均可提高木薯地土壤养分含量和含水量,改善土壤理化性状和土壤微生物区系组成。处理1的木薯产量增幅达到35.81%,差异极显著。本试验条件下,木薯最优的施肥及耕作栽培模式是技术综合集成生物有机肥+测土配方肥+盖膜集雨水+深耕(处理1)。 相似文献
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30年来我国玉米主要栽培技术发展 总被引:10,自引:4,他引:6
改革开放30多年来,我国玉米生产发展迅猛,多项栽培技术对促进我国玉米生产发展发挥了重要的作用。本文从品种、种植方式、施肥、灌溉、病虫草害防治、生长调控等方面系统总结近30多年来我国玉米生产中应用和发展的20项主要栽培技术。 相似文献
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通过对江西省棉花产业的调研,从棉花生产、加工、流通与消费4个方面分析了江西棉花产业面临的形势,提出了提高棉花生产力水平和推进棉花产业化经营的江西省棉花产业发展路径,并提出实行政策引导、科技创新带动等加快江西省棉花产业发展的建议. 相似文献
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Anticipating the direction for change in the current cotton insect pest management system in francophone African countries, different pest management strategies were investigated to reduce cotton protection costs and to improve overall pest control decision-making at the farmer level. Four strategies aimed at timing and limiting insecticide applications, were designed to fit the semiliterate level of farmers and pest profiles. Strategy 1 focused on using control thresholds early in the season, Strategy 2 on reducing the dosage in mixtures, while Strategies 3 and 4 were associated with the use of single active ingredients instead of mixtures. These strategies were assessed at the main research station Bouaké, Côte d'Ivoire, and were shown to be effective when compared with the current protection programme. The number of treatments and the amount of insecticides applied was reduced while achieving equal or better pest control and yields. The strategies proved to be safer to some beneficial arthropods. Their cost-effectiveness needs to be assessed in more detail at farm level to select the most financially attractive strategy. 相似文献
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扶桑绵粉蚧部分生物学特性研究 总被引:1,自引:0,他引:1
扶桑绵粉蚧Phenacoccus solenopsisTinsley给我国的棉花产业发展带来了巨大的威胁。针对扶桑绵粉蚧的形态特征、行为习性、发育起点温度和有效积温以及越冬前后脂肪含量的变化等进行了研究,结果表明:扶桑绵粉蚧存在雌雄二型现象,在30℃条件下,卵、若虫(1龄、2龄、3龄)的生长发育均较快,发育历期分别为1.2±0.17,4.5±0.50,2.3±0.26,3.2±0.17 d,产卵前期为8.1±0.06 d;卵的发育起点温度为14.07℃,有效积温为10.12 d.℃,若虫期(1龄、2龄、3龄)的发育起点温度为7.50,14.74,13.65℃;扶桑绵粉蚧越冬前、后脂肪含量存在明显差异,分别为35.86%和4.9%。 相似文献
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Bt-cotton varieties can control lepidopterous pests, hence offering the possibility to reduce chemical pesticide use. India, with the largest cotton-growing area globally, gave commercial approval for Bt cotton in 2002 and a rapid adoption of the technology is expected. This paper uses a stochastic partial budgeting approach that captures the key pest control properties of Bt cotton taking into account uncertainty of pest pressure, control effectiveness and prices to assess the profitability effects of Bt varieties and hence complements previous studies that generally excluded such issues. Results of the simulation model reveal that under the current price situation a prophylactic chemical control strategy dominates the use of Bt varieties in both, irrigated and non-irrigated cotton. The effect of a higher cotton price is assessed in a second scenario that depicts a Bt cotton variety with improved fiber quality than varieties currently approved for commercial planting. Under this assumption, the Bt strategy would be slightly better than the prophylactic use of chemical pesticides. The model can be extended to include pests other than the bollworm and correlations among variables, e.g. prices and yield, provided sufficient evidence for such correlation exists. Results of this analysis show the impact of uncertainty in the main variables that influence the profitability of Bt cotton and alternative crop protection methods. 相似文献