额外的要害词：不施肥处理、氧化应激。
土地种上庄稼而不施肥，很快就会变得贫瘠。
田里种了庄稼而不施肥，土地很快就会变贫瘠。
施磷二铵处理的根冠比明显低于不施肥处理和施尿素处理；
Root-shoot ratio is the lowest in the diammonium orthophosphate treatment;
CindyHaynes表示，土壤肥沃就只需少量或不施肥。
Cindy Haynes says little or no fertilizer is needed in fertile soils.
分施肥和不施肥两组比较分析了早春施肥对东非狼尾草生长的影响。
The study, divided into two groups: fertilizing in early Spring and non-fertilizing, was carried out for analyzing the effects of fertilizing on growth of Kikuyu grass.
不论是木麻黄或细枝木麻黄，施肥区林木的生长均超过对照不施肥区。
The forest trees of regeneration of Casuarina grow well in the coastalsand land …
不施肥或施肥不足，则成为影响红富士幼树生长、发育和早实性的主要限制因子。
Abiotrophy resulted from soil fertility inadequacy was a main limiting factor for the growth and development of apple trees in this region.
产量为1吨/公顷的麦田就像非洲的农田，原因嘛都一样：作物不施肥，也不用杀虫剂或别的玩意。
The wheat yielding a tonne a hectare is like an African field, and for the same reason: this crop has had no fertiliser, pesticide or anything else applied to it.
以褐土类潮褐土亚类潮垆土土属黑底潮砂泥土土种为研究对象，探讨长期定点不施肥对土壤养分含量及作物产量的影响。
This paper studied the effects of no fertilization on soil nutrients and crop yield in meadow cinnamon soil in Tangyin County.
长期单施氮肥较不施肥的对照（CK）玉米籽粒营养品质有一定的改善，但籽粒粗脂肪含量和淀粉粘度有不同程度的下降。
P had more important effects on corn qualities than K. Compared with CK, long-term N-applying only could improve the corn nutrition, but decrease the flour ash content and starch viscosity.
我没有在这片地上施肥，我不是它的主人，不过是一个居住在无主之地上的人，我不希望种那么多的地，就没有一下于把全部的地都锄好。
I put no manure whatever on this land, not being the owner, but merely a squatter, and not expecting to cultivate so much again, and I did not quite hoe it all once.
我没有在这片地上施肥，我不是它的主人，不过是一个居住在无主之地上的人，我不希望种那么多的地，就没有一下于把全部的地都锄好。
I put no manure whatever on this land, not being the owner, but merely a squatter, and not expecting to cultivate so much again, and I did not quite hoe it all once.
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