五种叶面喷施剂对茶树增产效应的对比试验

2011年在飞竹镇梧桐村茶园内,用茶丰素、茶博士、茶叶催芽素、磷酸二氢钾、尿素等五种叶面喷施剂进行对比试验。实验结果表明:五种叶面喷施剂都有一定的增产效果和经济效益,但以茶丰素的作用最佳,茶博士、茶叶催芽素、磷酸二氢钾的作用又优于尿素。     

泗阳县玉米测土配方施肥试验

为明确测土配方技术在泗阳地区玉米生产过程中的实际效果，通过田间试验对玉米生育期、产量构成和效益等进行了对比分析。试验结果显示：采用14.8-9-8的肥料配比能显著提升玉米肥料利用率，提高产量和收益。相较常规施肥，测土配方施肥对玉米生育期影响较小，但玉米穗粒数和千粒重提升效果显著，分别提升了1.88%和3.89%；测土配方施肥的氮、磷、钾肥利用率和养分平均利用率分别为40.77%、28.02%、51.18%，相较常规施肥分别提升了11.55%、4.07%、21.46%，养分平均利用率提升了12.36%；测土配方施肥籽粒产量为9535.04kg/ha，相较常规施肥增产429.99kg，增产率为4.72%，纯收益每公顷提升1269.60元。     

主要栽培技术对"姜三七"产量与药效成分的影响

研究不同种植密度、不同肥料用量和不同施肥类型对"姜三七"产量和药用成分含量的影响,为"姜三七"的人工栽培措施的制定提供依据。结果表明:种植密度与产量呈显著正相关;与不施肥(对照)相比,有机肥+复合肥组合处理增产198%,施用复合肥处理的樟脑和莰烯含量分别增加1.14%和5.74%。     

高水肥密植条件下大豆地上部干物重变化动态

在高施有机肥、地下亚表层灌水、窄行密植栽培模式下,对大豆合农60及对照品种垦丰16地上部干物质变化动态进行分析。结果表明:合农60荚干重增加明显,后期干物重积累迅速。在高水肥和小垄密植栽培条件下,窄行密植品种间存在差异,合农60为抗倒伏,适合于窄行密植的高产品种。     

The Magnesium Status of Some Fiji Soils

Abstract

Magnesium (Mg) is an essential macronutrient element for all living organisms, but literature reports of Mg deficiency in agriculture and forestry appear regularly. In many tropical areas, Mg is added to soils by using dolomitic limestone and as minor additions through impurities in some fertilizers. Minimal information is available on the Mg status of Fiji soils, and deficiencies have been observed in some crops. This study investigated the Mg status of a range of Fiji soils and found that major agricultural soils of Fiji contain variable amounts of Mg, both in the total concentrations and in the different forms of the element present. The variations can be related to the soil parent materials, degree of weathering, clay content, and mineralogy. Low plant‐available Mg concentrations are present in many of the highly weathered soils with limited reserves present. Development of intensive agriculture should consider Mg when developing fertilizer programs.     

氮钾配施对水稻空育131品质的影响

为了探究空育131的高产优质栽培的合理氮钾配施技术,试验采用随机区组设计,研究不同氮肥与钾肥互作对空育131品质的影响。结果表明:不同肥料处理对水稻碾磨品质、外观品质、营养品质及食味品质的影响显著(P0.05),不同肥料处理对水稻食味评分的影响均达到显著水平,且存在极显著的互作效应,氮钾互作下的食味评分以处理N_3K_4最高,即氮肥180kg·hm~(-2),钾肥135kg·hm~(-2)时为最佳配置,食味达到85.2分,较不施肥提高10.5%,差异达显著水平。     

红皮洋葱新品种‘西葱1号’的“一道清”高效栽培技术研究

将“一道清”的高产长效施肥技术在激光诱变选育出的红皮洋葱新品种‘西葱1号’上施用，通过与’常规施肥试验的对比，得出使用这种施肥技术可显著提高肥料利用率25％左右，能满足洋葱生长全过程的需要；还能降低洋葱早期抽薹率50％左右，改善洋葱品质，产量提高5％以上，施肥上用工减少5／4以上。在生产应用上有极好的前景。     

香蕉茎秆废弃物综合利用研究现状与分析

介绍中国香蕉种植情况及香蕉茎秆废弃物状况，阐述国内外香蕉茎秆废弃物在纺织、造纸、饲料、肥料、能源等领域的利用状况及研究进展，结合香蕉产业发展现状分析香蕉茎秆废弃物综合利用过程中存在的问题，提出对策性建议。     

Corn (Zea mays L.) Grain and Stover Yield as Affected by Soil Residual Mineral Nitrogen

Evaluation of nitrogen (N) dynamic in soil using regression equations is important for proper determination of N fertilization. A 3-year field experiment was conducted to (1) develop the best-fitted regression model relating corn grain and stover yield to soil residual ammonium (NH₄)-N and nitrate (NO₃)-N for corn yield prediction and (2) evaluate how such a model can be beneficial to the health of ecosystem by predicting the appropriate rates of N fertilization for corn production. Soil NH₄-N and NO₃-N were determined at corn harvest at the depths of 0–30 and 30–60 cm. Nitrogen fertilizer rates and soil mineral N accounted for a maximum of 93% variation in corn grain yield. Soil mineral N enhanced corn yield more than N fertilizer. Totals of 63.1 and 14.1 kg/ha of soil residual NO₃-N and NH₄-N were found in the 0- to 60-cm depth, indicating the importance of performing soil N tests.     

不同浓度肥料对苗菜生长的影响

以生菜、甜菜、苦苣、红苋菜为试材,采用无土栽培方式,研究喷施不同浓度的肥料对不同苗菜生长的影响。结果表明:对苦苣、苋菜、甜菜适宜喷洒3‰浓度的肥料,对生菜类苗菜适宜喷洒5‰浓度的肥料。