1) conventional border irrigation
常规畦灌
1.
But under the conventional border irrigation it changes very sharply in 0~40 cm soil sections and the difference of nitrate nitrog.
通过大田测坑玉米种植试验研究,分析了常规畦灌和膜孔灌条件下农田土壤硝态氮的分布特性。
2) border irrigation
畦灌
1.
Linear regression approach for estimating soil infiltration parameters of border irrigation;
畦灌土壤入渗参数估算的线性回归法
2.
Nonlinear regression method for estimating infiltration parameters according to border irrigation data;
用畦灌试验资料推求土壤入渗参数的非线性回归法
3) conventional furrow irrigation
常规沟灌
1.
In this paper,suitable buried depth and irrigation water quantity of underground drip irrigation in clover field are researched according to the soil moisture change of underground drip irrigation of clover field,through comparison with that of conventional furrow irrigation.
根据苜蓿地下滴灌土壤水分变化 ,并以常规沟灌为对照 ,对苜蓿田间地下滴灌的适宜埋深和灌水量进行了研究。
4) normal irrigation with water layer
常规淹灌
1.
To contrast infiltration irrigation through shallow furrow with normal irrigation with water layer.
结果表明,在高温多雨的气候条件下,水稻浅沟渗灌栽培技术既可大幅度节水,又能显著提高产量,与常规淹灌栽培相比,浅沟渗灌技术在早稻的整个栽培过程中,可节水3129m3/hm2,节水率达48。
5) normal irrigation
常规灌溉
1.
To sum-up the law of negative hydraulic head irrigation system,comparing of tomato experiment under negative hydraulic head irrigation and normal irrigation was carried out,soil water content distribution under different water supply tension was studied,the difference of plant sap flow and water consume under two irrigation methods was also analyzed.
为了总结负水头灌溉系统的供水规律,进行了负水头灌溉与常规灌溉条件比较下栽培番茄实验,分析了负水头灌溉系统不同吸力值下的土壤含水率动态变化,同时分析了负水头灌溉与常规灌溉耗水量以及植株蒸腾的差异。
6) intermittent border irrigation
间歇畦灌
补充资料:畦灌
畦灌
border irrigation
q IgUan畦灌(border irrigation)灌概水在畦面上流动过程中以重力作用渗入土壤的灌溉方法。畦灌方法简单,但要达到定额,均匀灌水,对平整土地的要求较高,必须修建临时渠道和土埂。灌水后,土壤团粒结构易遭破坏,形成表土板结。 畦灌适用于灌溉窄行密植作物,如小麦、谷子、牧草、蔬菜等。适宜畦灌的地面坡度为0.001一0.003,最大可达0 .02。但坡度过大时土壤易被冲刷,引起水土流失。 畦田的长和宽与地面坡度、土地平整程度、土壤透水性、入畦流量及农机具尺寸等有关。入畦流量以保证灌水均匀,不冲刷土壤为原则。通常单宽流量控制在每米3一6升/秒,畦长多采用30一100米,畦宽2一4米,多为农机具尺寸的整倍数。菜田的畦长较短,15一20米,畦宽0.5一1.咪。当入畦流量一定时,对土壤透水性强而地表坡度小者,畦长取小值;反之,则取大值。畦埂高常用0.20一0.25米,地边埂稍高于畦埂。在土地精细平整条件下,畦长也有采用400一500米的。 从末级渠道向畦田供水,可采用虹吸管或灌水管引水入畦;也可用带孔的移动式硬管或软管代替末级渠道,每个孔向一个畦田放水。 畦口的放水时间应根据畦长、坡度、土壤透水性、入畦流量来确定。通常采用畦内水流长度与畦长的比数做为畦口放水时间的依据,如九成改水,即水流到达畦长的90%时,进行封口。封口后,水流将继续向前流动,至畦尾时全部渗入土中。按中国经验,在一般土壤条件下,畦长50米左右的采用八成改水;畦长30一40米,九成改水;畦长30米以下,十成改水。 (朱风书)
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