double cropped造句
例句与造句
- wm in no-tillage corn in wheat-corn double cropping system in north china
免耕制度中的杂草动态 - continuous double cropping
两熟连作 - losing irrigation water may mean either abandoning land or less double cropping
灌溉用水短缺的直接影响不是废弃农田，就是减少一年两作。 - situation, potential and strategies of grain production in double cropping region of china
北方农牧过渡带农户农业生产系统模式评价与优化研究 - experimental study on technology system of soybeans rotary tillage and seeding of double croping one year
一年两作旋播大豆技术体系的试验研究 - It's difficult to find double cropped in a sentence. 用double cropped造句挺难的
- theroy and techniques of vigorous root-strong culm-weighty panicle cultivation method for double cropping rice
双季稻旺壮重栽培法的理论与技术 - jin et al . ( 1990 ) has used this systematic approach successfully in guiding maximum yield research in wheat-corn double cropping systems
金继运等人1990年用该方法成功地指导了小麦-玉米一年两熟种植制度的最高产量研究。 - dissemination of rice water weevil lissorhoptrus oryzophilus kuschel to the coastal area in north of zhejiang province where the single and double cropping rice were mixed cropped
稻水象甲传入浙北沿海水稻单双季混栽区 - wheat-maize rotation is one of the major double cropping systems, taking an important place in grain production in shandong province, about 2.36 million ha accounting for 54.5 % of the total cultivated acreage, producing 21.7 million tonnes grain, 57.9 % of the total in 1990
小麦-玉米轮作是主要一年两作制之一，在山东省粮食生产中起重要作用，大约236万公顷，占总耕地面积的54.5%，生产2170万吨粮食，为1990年粮食总产的57.9%。 - some demonstration and extension work based on existing scientific results have been done such as developing grain in large area of land using comprehensive cultivation measures in zibo city in 1987 and research on response of highly yielding crops to potassium and proper distribution of potash fertilizers in double cropping systems supported by ppic in 1990
已根据现有科技成果作出一些示范推广工作，如1987年在淄博市用综合栽培措施在大面积土地上开发粮食生产，以及1990年在ppic资助下研究一年两作制下高产作物对钾的反应和钾肥合理分配。 - abstract : the investigation of summer migration of rice water weevil lissorhoptrus oryzophilus kuschel in double cropping rice area of zhejiang province in 1994 and 1995 indicated that the main cause of its always low population density in second generation is that most of the adults of first generation emigrated from early rice fields for summer and winter hibernation
文摘:研究表明，浙江省双季稻区稻水象甲二代虫量低的首要原因是绝大部分一代成虫迁出早稻田夏蛰并越冬，构成二代虫源的比例极微。 - referring to the achievements of conservation tillage on dry land farming, there is a series of work to be done to develop new tillage techniques to adapt to double cropping system of wheat and maize in shandong province . such work includes controlling the combine traveling along the line, return the stalk to the field after chopped, subsoiling being done in maize's growing stage . the advantage of subsoiling is to make the soil inter placed with soft and hard strips, which is good for decreasing runoff and vaporizing, and retaining rain
1、保护性耕作条件下，普通小麦条播机的播种质量较差，小麦的田间出苗率比传统耕作低9.3；保护性耕作小麦冬前地上部分的生长状况也较传统耕作小麦差；由于根系的生长条件较为优越，保护性耕作的小麦的根系生长旺盛、分布广，越冬后有利于小麦的地上部分生长，大量发生春季分蘖和次生根，幼穗强烈分化，表现出较传统耕作小麦强的生长优势，产量提高6左右。 - the testing results of straw cutting and field experiment show that this mechanism has excellent anti-blocking capability . ( 2 ) a new no-till planter equipped with the strip chopping anti-blocking mechanism was developed . compared with other no-till planters, it possesses higher anti-blocking capability and suits the need of seeding in huabei plain where the winter wheat-summer corn continuous double cropping system gives much straw and short planting season
（2）研制出新一代玉米免耕播种机，配以新型防堵机构，防堵性能优越，连续三年分别对三代样机进行的田间试验表明，可在地表整秆覆盖量10t/ha的条件下连续作业而不堵塞，该播种机的防堵性能好。 - in this thesis, a new strip chopping anti-blocking mechanism and a new no-till planter operating well in heavy straw mulching condition are developed from the following aspects : ( 1 ) in order to solve the problem that the no-till planters can not work well when the mulched straw is long and thick, especially in the double cropping area of huabei plain where the winter wheat gives a high yield, a new strip chopping anti-blocking mechanism was developed . it consists of a group of rotary blades, a narrow tine opener, a shear bar, a hood and a deflector
在以下几个方面进行了较为深入的研究：（1）在对国内外免耕播种机防堵装置研究的基础上，针对华北一年两熟地区麦收后地表覆盖量大的特点，通过对驱动式和从动式防堵装置的对比实验，设计出一种具有高效防堵能力的带状粉碎防堵装置，该装置由组合刀片、开沟器、定刀片、罩壳和导草扳组成。 - the investigation of summer migration of rice water weevil lissorhoptrus oryzophilus kuschel in double cropping rice area of zhejiang province in 1994 and 1995 indicated that the main cause of its always low population density in second generation is that most of the adults of first generation emigrated from early rice fields for summer and winter hibernation
研究表明，浙江省双季稻区稻水象甲二代虫量低的首要原因是绝大部分一代成虫迁出早稻田夏蛰并越冬，构成二代虫源的比例极微。
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