1) weed covering
杂草覆盖
2) rice straw covering
稻草覆盖
1.
The results showed that for all treatments,the emergence rate of conventional model was the highest,the total yield and yield of per plant of micro-tillage with 8 cm-thick of rice straw covering was the highest,and the commodity rate of potato for no-tillage with 8 cm-thick of rice straw covering was the highest.
因此,生产上采用少耕或免耕稻草覆盖栽培方式,可提高马铃薯的产量和商品性。
3) grass cover
生草覆盖
1.
Comporned with the cherical control orrea the ecological cotr5ol crren of loguat orchond s grass cover,whose soil nutrient was improved obviously.
枇杷园进行生草覆盖的生态控制区与化学防治区相比,土壤养分明显提高,土壤有机质、全N、速效N、有效P、速效K、pH含量分别提高了4。
2.
Grass cover system is an effective measure for orchard management of the arid and semiarid area in our country.
果园生草覆盖区与对照相比土壤养分明显提高,有机质增加4。
4) Straw mulching
稻草覆盖
1.
Effects of straw mulching to slope red soil on fertility maintaining and crop yield;
稻草覆盖对坡地红壤培肥及作物增产的效果
2.
Ecological regulation effects of straw mulching in tea plantation in subtropical hilly red soil region;
稻草覆盖对红壤丘陵茶园的生态调控效应
3.
Ecological effects of the weed community in tea garden with intercropping white clover and straw mulching;
间种白三叶草和稻草覆盖控制丘陵茶园杂草效果
5) mulch of plastic film and straw
膜草覆盖
6) grass coverage
草被覆盖
1.
Experimental study on the effect of different grass coverages on the overland flow velocity;
草被覆盖对坡面流流速影响的人工模拟试验研究
2.
The objective of this study is to reveal the influence of grass coverage on the time of runoff beginning and stop in the hillslope-gully slope erosion system on loess hilly area.
草被覆盖对坡面流有明显的阻延作用。
3.
Results showed that the sediment yield decreased with increasing grass coverage atsmaller water inflow rates in scouring experiments.
通过室内放水冲刷试验方法,研究了坡沟系统坡面不同草被覆盖度及空间配置下,坡沟系统侵蚀产沙变化过程及特征。
补充资料：杂草
| 杂草 weed 目的作物以外的，妨碍和干扰人类生产和生活环境的各种植物类群。主要为草本植物，也包括部分小灌木、蕨类及藻类。全世界约有杂草8000种，与农业生产有关的主要只有250种。中国约有杂草119科1200种。除可按植物学方法分类外还可按其对水分的适应性分为水生、沼生、湿生和旱生，按化学防除的需要分为禾草、莎草和阔叶草，此外还可根据杂草的营养类型、生长习性和繁殖方式等进行分类。其生物学特性表现为：传播方式多，繁殖与再生力强，生活周期一般都比作物短，成熟的种子随熟随落，抗逆性强，光合作用效益高等。农田杂草的主要为害为：与作物争夺养料、水分、阳光和空间，妨碍田间通风透光，增加局部气候温度，有些则是病虫中间寄主，促进病虫害发生；寄生性杂草直接从作物体内吸收养分，从而降低作物的产量和品质。此外，有的杂草的种子或花粉含有毒素，能使人畜中毒。 防除杂草的方法有：①植物检疫。对国内外各地区间调运的种子和苗木进行检查处理，防止新的外来杂草传播。②人工除草。③机械除草。④物理除草。用水、光、热等物理因子除草。⑤化学除草。用除草剂除草而不伤害作物。其选择性是根据除草剂对作物、杂草的高矮和根系深浅不同的“位差”、种子萌发先后和生育期不同的时差、植物组织结构、形态及其抗药性的差异等特性而实现。⑥生物除草、利用昆虫、禽畜、病原微生物和竞争力强的置换植物及其代谢产物防除杂草。⑦生态除草。即创造有利于作物生长而不利于杂草繁生的生态环境除草。⑧综合防除。运用各种措施间的互补和协调作用，高效而稳定防除杂草。 |
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条