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Fertilizer is a substance put on land to fertilize it.

肥料是施在地里使之肥沃的物质。

It is further substantiated by information presented by Xie,(1991) and Zhu,(1991) who both pointed to the fact that potassium deficiency and therefore responses to potassium fertilization, are growing as a result of greater offtake of potassium from the soil by crops, than is being returned by fertilizer.

Xie (1991)和 Zhu (1991)的报导又证实了这个假设。他们指出,由于作物吸钾量高于肥料归还量,缺钾和施钾有效面积正在增加。

Preplant dry materials such as 16-20-0 and 18-46-0 are often shanked in prior to planting/transplanting.

作物基施的固体肥料通常于播前或移栽前开沟施入土壤。

When Azolla was used as green manure in early and late season rice,the 15N.utilization efficiency by rice was 28.8%,24.3% respectively.

而红萍直接压施作肥料,早、晚季稻株对萍体氮素的利用率分别为28.84%和24.30%。

Through experiment of 15N microplot showed that: gaseous losses of fertilizer nitrogen was 1.259g·m~(-2), soil residued nitrogen was 1.023g·m~(-2) in Ecological Balanced Fertilization plot, monitored at the same time that chemical nitrogen fertilizer was almost no leakage because there was illuvial layer in the depth of 100~120cm in this area.

通过15N微区试验测得草甸黑土生态平衡施肥区肥料氮气态损失为1.259g·m~(-2),土壤残留为1.023g·m~(-2),同时监测到,在该地区100~120cm土层处由于有淀积层的存在,化学氮肥几乎没有渗漏。通过设置不同施氮水平试验,结果显示:大豆播种后,田间土壤氨挥发累积量随氮肥用量增加而增大。

Organic waste can be composted and then used as a fertilizer.

有机的废物可能被施堆肥并且然后被用如肥料。

Semi-sentient plant that wriggles and squeaks uncomfortably when given too much dragon dung manure.

部分有感觉的植物,当给它施太多龙粪肥料时,会难受地扭动尖叫起来。

Soil samples were collected from a 17-year fertilization experiment site in southern Loess Plateau to study the effects of different fertilizations and fallowing on the characteristics of soil nitrogen mineralization, and the transformation of exogenous NO3(superscript -)-N in sterilized and non-sterilized soil samples.

以黄土高原南部17年长期定位试验不同处理土壤为研究对象,研究了不同肥料处理及撂荒条件下土壤氮素矿化特性、灭菌与不灭菌条件下不同肥力土壤对施入外源硝态氮转化的影响。

It is conducive to uptake soil nitrogen for flue-tobacco on dryland soil with maize-tobacco rotation before topping (60 days after transplanting) and uptake soil nitrogen for flue-tobacco on paddy soil with rice-tobacco rotation after topping.2 The nitrogen utilization efficiency of rapeseed cake, rice straw and rape straw were 19.5%, 15.5%, 8.1% respectively, and the inorganic fertilizer nitrogen utilization efficiency were 41.1%, 42.7% and 35.7% under the combined application of organic additives and inorganic nitrogen fertilizer. The contribution rate of rapeseed cake, rice straw, rape straw to accumulated nitrogen of flue-cured tobacco were 1.0%, 2.4%, 2.7% respectively by the combined application of organic additives and nitrogen fertilizer. Flue-cured tobacco for organic nitrogen absorption meet with the nitrogen needs laws of high-quality tobacco, indicating that the combined application organic additives and inorganic nitrogen fertilizer reduces the nicotine content of tobacco, an increase of sugar/nicotine ratio and improved the quality of tobacco. In which the role of rice and rape straw is greater than the rapeseed cake can be used as measures to lower nicotine.3 Nitrogen accumulation in flue-cured tobacco with the total nitrogen input was a significant positive correlation during the growth stage of flue-cured tobacco. The total nitrogen input for the 156.3-405.5kg.hm-2, in which the soil nitrogen mineralization capacity account for 22.6%-54.3%, with an average of 34.5%, that is, soil nitrogen mineralization accounted for 1/3 of the total nitrogen input.

旱地轮作土壤有利于烤烟生长前期对土壤氮素的吸收,水旱轮作土壤增加了烤烟生长后期对土壤氮的吸收。2在有机添加物与无机氮肥配施条件下,烤烟对有机添加物中氮的吸收规律基本符合优质烟的需氮规律,其中烤烟对菜籽饼肥、稻草秸秆、油菜秸秆所含氮素的利用率分别为19.5%、15.5%、8.1%,所配施无机氮肥的利用率分别为41.1%、42.7%和35.7%,菜籽饼肥、稻草秸秆、油菜秸秆对烤烟氮素累积量的贡献分别为1.0%、2.4%、2.7%。3不同轮作方式及添加有机物条件下氮素平衡结果显示,烤烟生长期间的氮输入总量为156.3-405.5kg.hm-2,其中矿化氮量为输入总氮量的22.6%-54.3%,平均为34.5%,约为输入总氮量的1/3;肥料氮的利用率为31.4%-42.7%;植烟土壤氮素表观损失率在37.5%-57.2%,平均为46.9%,约为输入总氮量的一半。

Inwheat intercropped with soybean not only N situation could be improved butalso P situation could be.2In intercropping,the pH of soybean rhizospherewas decreased by increasing the R-Apase activity,which could decelerate thetransforming and fixing P fertilizer.3In both monoculture and intercroppingsystem,the soil pH of rhizosphere was affected by cropping system at two Plevel which only 0.1-4mm distance from the root surface,but the effect of S-Apase activity in the rhizospher soil by cropping system was less than3mm.In effect,the rhizosphere P was really available nutrient,and applyingP to rhizosphere was effective ways to reduce the P nutrient competition.4Inwheat/soybean intercropping,the peak stage of reduction ability of roots wasthe same as that of the root growth,so that the time compensation appearedin intensity of nutrient absorption.

间套作大豆、小麦、玉米根系Apase的差异又反映出大豆利用土壤磷的潜在能力最大,而玉米最小,可见禾谷类的小麦与大豆间套后不但能改善小麦的氮素营养状况还使磷素营养也得以好转。2)间套大豆根际pH值的下降,导致磷肥施入土壤后形成〓-P的比例显著提高,转化成〓-P等难溶性磷减少,说明间套的大豆能减缓肥料磷在土壤中的转化和固定,减少磷素向无效化方向转化。3)复合群体根际土壤pH值的影响一般只发生在0.1-4mm的根际微区,而土壤磷酸酶的影响供磷与否在距根表3mm以外都无多大差异,说明根际磷才是真正有效磷,根际施磷是解决磷素竞争的有效途径。4)。

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