共查询到18条相似文献,搜索用时 117 毫秒
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不同施肥方式对水稻生长、养分吸收和品质的影响 总被引:1,自引:0,他引:1
研究不同施肥方式对田间水稻生长、养分吸收和品质的影响。结果表明,施肥能显著提高水稻产量,增产幅度在7.62%~41.90%,NPK与有机肥配合施用、施用控释肥分别增产31.75%和41.90%,氮磷钾对水稻增产作用NKP。氮肥农学利用率以缓控释肥处理最高,达11.08 kg/kg,氮肥利用率最高与最低相差31.10%;氮磷钾施肥+有机肥处理和控释肥处理田面水中速效氮含量显著低于其他处理,稻米品质最好。 相似文献
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新型海藻水稻专用叶面肥对不同品种水稻的增产效应 总被引:4,自引:0,他引:4
采用大田试验,研究了喷施新型海藻水稻专用叶面肥在不同品种水稻上的增产效果。结果表明,施用海藻水稻专用叶面肥对5个品种水稻(郑稻18、南粳49、南粳44、甬优2640和Y两优1号)均有增产作用。从产量构成因子分析,促进增产的主要原因是提高了水稻有效穗数和穗粒数。然而,不同品种水稻增产幅度不同,Y两优1号和郑稻18的增幅最大,其次是甬优2640。从经济效益分析,郑稻18和甬优2640的增加产值和产投比高于其他3个品种。综合而言,海藻水稻专用肥在郑稻18、甬优2640和Y两优1号上的施用效果相对较好。 相似文献
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本文采用肥料对比方法研究梅州市新农生物科技有限公司研制的水稻专用肥的应用效果。水稻专用肥对提高水稻成穗率、增加有效穗数、每穗实粒数、结实率等均有明显的效果。施用水稻专用肥可提高稻谷产量,且产量差异达显著水平。 相似文献
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肥料添加纳米碳在水稻上的施用效果 总被引:4,自引:0,他引:4
肥料添加纳米碳在水稻主产区5个地点的应用效果表明:100%常规肥料添加纳米碳处理与100%常规肥处理相比,产量平均增幅为9.5%;常规肥料添加纳米碳在节氮30%~50%的情况下,与100%常规处理相比,产量平均增幅为11.3%;常规肥料添加纳米碳处理比100%常规肥处理每公顷均有数百到数千元的经济效益。 相似文献
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One of the major objectives of on-farm research is to test and refine recommendations coming from controlled research conditions to suit the variable conditions met under farmer circumstances. In developing countries, resources available for agricultural research are limiting. Therefore the challenge is to develop methodologies favouring resource–use efficiency and facilitating relatively fast results. At the same time researchers must take advantage of a high level of farmer participation and sample environmental variables suspected of affecting the technology's performance. In this context, ways in which to deal with variability, both in terms of environment as well as in farmer management, become important. To present lessons learned, this case study describes first relevant aspects of the farming system, a brief history of the problem and the resulting experimental program. For illustration purposes, one year of data is presented in detail. This came from a farmer-implemented, farmer-managed test on urea use (30 kg/ha nitrogen) in rice cultivation based on water harvesting.Variation in rice yields has been investigated in order to determine whether known differences in cultivation circumstances (water level during fertilizer application, field position on the slope, rice variety used) warrant refining the recommendation regarding urea use. It is known for example that water height varying at application time can significantly influence the rice crop's response to nitrogen; however, in this investigation urea use proved to be an economically attractive option over the water level range investigated (5–15 cm).Although variable response to urea use due to environmental factors was identified, economic evaluation using Marginal Rates of Return showed that under all conditions urea use was justified. Therefore, the recommendation does not need to be refined, given the assumptions presented.Finally, the sustainability of urea use is discussed, in view of the fact that nitrogen application enhances crop yields and therefore increases the extraction of other crucial plant nutrients. 相似文献
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复合肥减量施用对覆膜栽培水稻产量和养分的影响 总被引:1,自引:0,他引:1
采用大田试验研究水稻覆膜栽培条件下复合肥配施有机肥(榨菜叶)对水稻产量、养分吸收量和利用率的影响。结果表明:水稻覆膜栽培条件下减少复合肥施用量20%,较CK(淹水栽培)增产6.9%,在此基础上配施有机肥较CK提高水稻产量14.3%~19.0%,水稻氮、磷、钾养分利用率提高4.7~26.1百分点。在紫色土水稻产区覆膜栽培条件下复合肥减量20%及配施有机肥15~30 t/hm2是水稻节肥增产的有效途径。 相似文献
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水稻加施高活性硅钙镁钾肥增加产量和降低稻谷中镉含量的效果 总被引:2,自引:0,他引:2
介绍高活性硅钙镁钾肥在水稻上的大田试验。试验结果表明,在习惯施肥的基础上,667 m2加施高活性硅钙镁钾肥50 kg,水稻产量增加39.0~85.2 kg,相对增产5.3%~18.9%,使稻谷中镉从0.12 mg/kg降低到0.04 mg/kg。 相似文献