共查询到17条相似文献,搜索用时 62 毫秒
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硅肥在塑料大棚内春黄瓜上的增产效果研究 总被引:4,自引:0,他引:4
我国硅肥在黄瓜上的研究报道不多,据我们在春黄瓜上试验结果表明,施硅肥的比对照茎粗增加0.18 ̄0.24cm,株高增加4.8 ̄25.1cm,秧节数比对照增加15% ̄42%左右,增产达25% ̄29%以上,并且硅肥有改善黄瓜的外观与品质的作用。 相似文献
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硅肥对甘蔗的增产效果研究 总被引:6,自引:0,他引:6
硅肥对甘蔗试验效果表明,在不同地点,不同品种上,每公倾施硅肥750kg与对照不施硅肥相比,增产率达10.9% ̄23.3%,施用硅肥后的甘蔗,植株生长挺拔,叶片清秀,光亮,病虫害减少,抗逆性好,施用硅肥平均每公顷增收5242.50元,投入产出比为1:17.5。 相似文献
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硅肥对苹果生长产量及品质影响的研究 总被引:1,自引:0,他引:1
通过不同品种不同地形生长的苹果施入硅肥后对其生长、产量及品质影响的研究表明,硅肥对苹果树体的生长发育具有良好的作用,施入适量的硅肥可使苹果增产10%以上,并能大大改善苹果的品质。硅肥的这些影响在一定范围内是随着施入量的增加而增大的。 相似文献
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赤泥硅肥在玉米上试验研究 总被引:2,自引:0,他引:2
玉米约占全国粮食总产的20%,施肥在玉米增产诸因素中能起到25%~30%的作用,通过试验,玉米施用硅肥后提高抗青枯病能力,施肥量为750kg/hm^2时,在玉米上的增产效果达到14%~23.4%,投入产出比为1:10~20。 相似文献
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对沙地玉米进行不同施肥量的试验研究。结果表明,试验条件下在沙地增加施肥量特别是N肥可显著增加玉米的产量,增幅达14.2%~73.8%,而增施P肥则对产量增加不显著;玉米产量与施肥量显著相关,相关系数为0.827;同时随着沙地玉米产量的增加,其水分利用率也明显提高,增幅达13.5%~70.8%。 相似文献
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水肥耦合对玉米田间土壤水分运移的影响 总被引:3,自引:0,他引:3
以干旱区绿洲农田玉米水肥耦合试验为基础。利用含有根系吸水项的一维土壤水动力学模型,模拟了不同水肥条件下玉米蒸散、根系吸水、土体贮水量变化以及田间土壤水量平衡。结果表明:在玉米生长初期以棵间蒸发为主,其后则是以植株蒸腾为主;玉米在30-40cm土层吸水速率达到最大值;玉米灌水量为田间持水量的70%与85%对土壤0~80cm土层贮水量的贡献是相等的,并且高肥力在一定程度上可增强根系的吸水能力,高灌水可增强玉米根系对养分的吸收利用,但对于提高水肥利用率来说,理想的处理为中肥中水。 相似文献
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在奈曼站农业观测场进行了5种水肥处理的玉米生长试验。结果表明,各处理的玉米株高快速生长期均从6月下旬始,至8月初达最高值。不施肥处理株高和茎粗生长在拔节后期落后于其他处理,早于其他处理停止生长。根量快速增长从6月底开始,至7月底结束,8月下旬根开始死亡,至9月20日,细根数量减少至峰值期的50%。高肥处理的根系增长率高于其他处理,其根密度值最大,不施追肥处理的最小。不浇水的处理在7月初雨季到来时根系开始快速增长。不施追肥的处理早于其他处理7d停止根系的增长。5种不同处理的根系生长动态趋势一致,均为单峰形。施肥量最大的处理(T1)产量最高,不施肥的处理产量最低。玉米生长期多次灌溉并不能促进生长,相反使产量减少。 相似文献
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XIN Liangjie 《地理学报(英文版)》2022,32(1):65-78
This paper studied the fertilizer rate(FR), fertilizer use efficiency(FUE) and fertilizer overuse rate(FOR) of rice, corn and wheat in China from 1998 to 2018 and briefly analysed the reasons why farmers were willing to apply more fertilizers.(1) The FR of grain in China reached 373.7 kg/ha in 2018, an increase of 26.8% compared to that in 1998. In 2018, the FR for corn was the highest, at 411.2 kg/ha, compared to the values of 338.3 kg/ha for rice and 371.7 kg/ha for wheat.(2) In recent years, the FUE of grain in China has obviously improved, with values of 32.9% in 1998, 36.7% in 2008, and 39.3% in 2018. In 2018, the FUE for rice was the highest(41.2%), followed by that for corn(39.9%), and the FUE for wheat was the lowest(36.0%).(3) By 2018, fertilizer was overused in all zones of rice, corn and wheat. In 2018, the average FOR for wheat reached 69.0%, which was 35.9% higher than that for corn and 42.8% higher than that for rice.(4) The lower price of chemical fertilizers was the main reason leading to overapplication.(5) Establishing market mechanisms and adjusting regional planting structures can be effective in reducing the application of chemical fertilizers. 相似文献
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This paper researches the behavior of using soil testing formula fertilizer at farms of different sizes. The study develops a probit model based on peasant household survey data from 11 grain production areas. The results prove that: First, obvious differences exist in the distribution of formula fertilizer use ratio among farms of different sizes; large-scale farmers are the highest, small-scale farmers are the lowest. Second, from external factors, the increased yield of corn, soil testing services, and information dissemination, it is clear that training has a significant positive effect on farmers’ use behavior; the influence of soil testing services is the greatest. Third the higher the degree of organization, marketization and scale of a farm, the more likely the farmer is to use soil testing formula fertilizer. Policy recommendations are made on the basis of the empirical research presented in this paper. 相似文献