double cropping 中文意思是什麼
double cropping
解釋
復種-
Theroy and techniques of vigorous root - strong culm - weighty panicle cultivation method for double cropping rice
雙季稻旺壯重栽培法的理論與技術 -
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
已根據現有科技成果作出一些示範推廣工作，如1987年在淄博市用綜合栽培措施在大面積土地上開發糧食生產，以及1990年在ppic資助下研究一年兩作制下高產作物對鉀的反應和鉀肥合理分配。 -
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
稻水象甲傳入浙北沿海水稻單雙季混栽區 -
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，浙江省雙季稻區稻水象甲二代蟲量低的首要原因是絕大部分一代成蟲遷出早稻田夏蟄並越冬，構成二代蟲源的比例極微。 -
Wm in no - tillage corn in wheat - corn double cropping system in north china
免耕制度中的雜草動態 -
Continuous double cropping
兩熟連作 -
Losing irrigation water may mean either abandoning land or less double cropping
灌溉用水短缺的直接影響不是廢棄農田，就是減少一年兩作。 -
Situation, potential and strategies of grain production in double cropping region of china
北方農牧過渡帶農戶農業生產系統模式評價與優化研究 -
Jin et al. ( 1990 ) has used this systematic approach successfully in guiding maximum yield research in wheat - corn double cropping systems
金繼運等人1990年用該方法成功地指導了小麥-玉米一年兩熟種植制度的最高產量研究。 -
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
小麥-玉米輪作是主要一年兩作制之一，在山東省糧食生產中起重要作用，大約236萬公頃，占總耕地面積的54 . 5 % ，生產2170萬噸糧食，為1990年糧食總產的57 . 9 % 。 -
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 、保護性耕作條件下，普通小麥條播機的播種質量較差，小麥的田間出苗率比傳統耕作低9 . 3 ；保護性耕作小麥冬前地上部分的生長狀況也較傳統耕作小麥差；由於根系的生長條件較為優越，保護性耕作的小麥的根系生長旺盛、分佈廣，越冬後有利於小麥的地上部分生長，大量發生春季分蘗和次生根，幼穗強烈分化，表現出較傳統耕作小麥強的生長優勢，產量提高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 ）研製出新一代玉米免耕播種機，配以新型防堵機構，防堵性能優越，連續三年分別對三代樣機進行的田間試驗表明，可在地表整稈覆蓋量10t / ha的條件下連續作業而不堵塞，該播種機的防堵性能好。 -
To meet the need of grain production, investigations such as property of nutrients uptake of high - yielding wheat, regularity of nutrient requirement of high - yielding maize, proper rate and ratio of npk fertilizers for high yields of wheat and maize, and rational rate and ratio of organic - n to inorganic - n in double cropping system have been conducted by shuming z. and yizhi l. et al. since 1980
為了滿足糧食生產需要，自1980年以來，張漱茗和劉毅志等人就開始調查高產小麥養分吸收特性、高產玉米養分需求規律、高產小麥和玉米氮磷鉀肥適宜用量和比例、一年兩作制中有機氮和無機氮的合理用量和比例。 -
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，浙江省雙季稻區稻水象甲二代蟲量低的首要原因是絕大部分一代成蟲遷出早稻田夏蟄並越冬，構成二代蟲源的比例極微。 -
Several trends are converging to reduce the grain area, including the loss of irrigation water, desert expansion, the conversion of cropland to nonfarm uses, the shift to higher - value crops, and a decline in double - cropping due to the loss of farm labor in the more prosperous coastal provinces
糧田面積萎縮是多種趨勢匯合共同作用的後果，包括灌溉用水短缺、沙漠擴大、糧田轉為非農用地、改種高價值作物，以及在比較富裕的沿海省份由於農業勞動力缺失致使一年兩作的萎縮。 -
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
在以下幾個方面進行了較為深入的研究： （ 1 ）在對國內外免耕播種機防堵裝置研究的基礎上，針對華北一年兩熟地區麥收后地表覆蓋量大的特點，通過對驅動式和從動式防堵裝置的對比實驗，設計出一種具有高效防堵能力的帶狀粉碎防堵裝置，該裝置由組合刀片、開溝器、定刀片、罩殼和導草扳組成。
分享友人