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油菜经济施肥量与施肥比例探讨 总被引:1,自引:0,他引:1
2006-2007年,在张家界市永定区溪河沿岸潴育性水稻土上开展了油菜氮、磷、钾三因素四水平的回归设计试验,以探讨不同肥料施用量与施肥比例对油菜经济性状、产量的影响,并根据目标产量确定油菜的最高产量施肥量及最佳经济施肥量。结果:油菜的最高产量施肥量为N159.15kg/hm2,P2O5 81.75kg/hm2,K2O 54.3kg/hm2,其产量为2170.5kg/hm2;油菜的最佳经济施肥量为N118.95kg/hm2,P2O5 61.5kg/hm2,K2O41.4kg/hm2,其产量为2121.15kg/hm2。 相似文献
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施肥对湘杂油6号产量影响及最佳施肥量研究 总被引:1,自引:1,他引:1
为了探索不同施肥量对湘杂油6号的影响,提高油菜单产,节省肥料成本,采用湘杂油6号于2007年在湖南耒阳进行了"3414"肥效试验.经三元二次回归数学模型分析,该品种在每公顷产量2 280 kg的最佳经济施肥量为:N161.1 kg,P2O596.3 kg,K2O126.7 kg;最大产量的施肥量分别为:N206 kg,P2O5110 kg,K2O156 kg.氮肥对单产直接作用最大,随着氮肥施用量的增加其株高、一次有效分枝数、单株有效角果数、每角粒数、千粒重增加显著;增施磷肥、钾肥对增加该品种单株有效角果数有显著作用;增施饼肥或硼肥,促进单株有效角果数、每角粒数,单产增加显著. 相似文献
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当前水稻施肥中存在的问题及解决对策 总被引:8,自引:1,他引:7
调查表明,目前我国水稻施肥上还存在一些问题,如化肥施用时期过于集中,重基肥,轻追肥;重面肥,轻深施;重碳铵,轻配方肥;重无机肥,轻有机肥。从而造成化肥利用率低,对环境造成面源污染,消耗大量能源。提出了相应的对策,即:推广推荐施肥方式,测土配方施肥,机械耕田和化肥深施一体完成,大面积种植草籽,利用机械收割推广稻草还田实现N,P,K等养分的循环利用。 相似文献
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[目的]为配方施肥技术推广应用提供科学依据.[方法]采用田间多点试验研究了配方施肥对单季稻产量、肥料利用率和经济效益的影响.[结果]结果表明,与常规施肥比,施用配方肥处理水稻的产量增加了3.33%.配方施肥处理的N、P、K肥当季肥料利用率分别提高了12.13%、8.61%和10.47%.配方施肥处理的纯收入比常规施肥增加了511.4元/hm2,增幅达到4.85%.[结论]配方施肥技术值得在当地进行推广应用. 相似文献
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不同施肥方法对免耕晚稻产量及经济效益的影响 总被引:1,自引:0,他引:1
2013年晚季进行了晚稻免耕栽培不同施肥方法试验研究,结果表明,免耕晚稻采用配方施肥法产量高,并以复混肥料配方施肥法产量最高。 相似文献
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The objective of the research was to determine the economic optimum nitrogen (N) fertilization rates and to determine the effects of N fertilization rates on tuber characteristics and fresh mass loss after storage under cold and ambient conditions of four potato cultivars, Ágata, Asterix, Atlantic, and Monalisa. The experiments were, simultaneously, conducted in the same area and similar experimental conditions during the fall/winter period in Viçosa, Minas Gerais State, Brazil. In each experiment, five N fertilization rates (0, 50, 100, 200, 300 kg ha?1) were evaluated in a randomized complete block design. For all cultivars, increasing N fertilization rate increased total and marketable yields and tuber dry matter yield up to a maximum following a quadratic model. Increasing N fertilization rate linearly increased the tuber protein concentration of Atlantic and Monalisa and had no effect on tuber pH. N fertilization rate effects on tuber mass, tuber titratable acidity, and fresh mass loss during storage were cultivar-dependent. N use efficiency (tuber yield divided by N fertilization rate) decreased with increase in N fertilization rate. The economic optimum N fertilization rates ranged from 147 to 201 kg ha?1 depending upon cultivar and relative prices of N and potato tubers. Depending on the cultivar, under favorable price conditions (low N price and high tuber price), the economic optimum N fertilization rates to be applied by potato growers were 92–95% of the estimated N fertilization rate for obtaining the maximum potato yield, whereas under unfavorable conditions (high N price and low potato tuber price) the economic optimum N fertilization rates to be applied should be decreased to 86–92% of the rates for maximum yield. 相似文献
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灰泥田晚稻测土配方施肥肥料效应田间试验报告 总被引:3,自引:0,他引:3
通过灰泥田土属三个土种晚稻测土配方施肥肥料效应田间试验,结果表明,灰泥田(烟后稻)最佳施肥量为:N201.06kg/hm^2、P20517.145kg/hm^2、K2088.215kg,/hm^2,N:P2O5:K2O=1:0.09:0.43,可获得6774kg/hm^2的理论产量,肥料产投比为0.36,每hm^2利润可达8699元;黄底灰泥田(烟后稻)最佳施肥量为N201.45kg/hm^2,P2053.465kg/hm^2,K2O98.58kg/hm^2,N:P2O5:K2O:1:0.02:0.48,可获得7626kg/hm^2的理论产量,肥料产投比为0.71,利润可达9960元/hm^2;沙底灰泥田(菇后稻)最佳施肥量为N160.605kg/hm^2、P2O5=63.33kg/hm^2、K2O=119.25kg/hm^2,N:P2O5:K2O=1:0.39:0.74,可获得8299.5kg/hm^2的理论产量,肥料产投比为0.64,利润可达10957元,/hm^2。 相似文献
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通过田间试验研究不同施肥处理对水稻产量、品质和经济效益的影响,从而确定水稻最佳施肥组合及产量限制因子。结果表明:限制该地产量的因子主要在氮和磷,N∶P2O5∶K2O=21∶7.4∶10.5的最佳施肥组合为合理施肥量,但不是最佳量,此结果还有待进一步试验验证。 相似文献