查询词典 terrace cropping

Soil enzyme activities were studied in long continnous cropping Cotton field and activated charcoal through cotton continuous cropping point trial.

试验通过棉花连作定点微区试验研究了棉花长期连作和活性炭处理后棉田土壤酶活性的变化。

There was no significant soil and water loss differences in equivalent peanut land between sole peanut and alley cropping systems. There were also 146-172mm surface runoff and 6503-7571kg ha〓 soil losses annually in alley cropping systems.

就可比花生种植面积而言，花生南酸枣间作方式下水土流失量与传统花生种植方式下没有显著差别，年地表径流和土壤流失量仍然分别高达146～172mm和6503-7571kg ha〓。

Twenty quadrats were selected randomly in the cropping fields of Xishan District of Mudanjiang City and its around areas. The hoarding habit of A. agrarius in the cropping fields in suburbs of Mudanjiang City was studied through hole-digging and measurement method.

方法］在牡丹江西山及周边的庄稼地内随机选择20个样方，采用挖洞测量法研究了牡丹江城市郊区庄稼地的黑线姬鼠的贮食习性。

Therefore, several experiments were carried out to study their effect on the growth of tobacco seedlings and the activities of enzymes in soils. The main objects were to realize the mechanisms and reasons of continues cropping obstacles, to provide scientific information for solving the problems produced by continuous cropping, and to improved the yields and qualities of fire-cured tobacco in tobacco-growing areas of Southwest China.

本项研究以烤烟根系分泌物和根残体为材料，探索它们对幼苗生长和土壤酶活性的影响，旨在研究烤烟连作障碍发生的机理和可能的原因，为进一步解决我国西南主要烟区的连作障碍问题，提高烟叶的质量和产量提供科学依据。

Alley cropping; strip cropping: Growing two or more crops in alternating strips or blocks on the same piece of land at the same time.

条植法；条播法：在同一块田里按条或块同时种植两种或两种以上的作物。

Alley cropping; strip cropping: Growing two or more crops in alternating strip s or blocks on the same piece of land at the same time.

条植法；条播法：在同一块田里按条或块同时种植两种或两种以上的作物。

Alley cropping; strip cropping Growing two or more crops in alternating strips or blocks on the same piece of land at the same time.

条植法；条播法在同一块田里按条或块同时种植两种或两种以上的作物。调拨成本，已分摊成本

All risk insurance 全风险保险,包全险 alley cropping; strip cropping Growing two or more crops in alternating strips or blocks on the same piece of land at the same time.

条植法；条播法在同一块田里按条或块同时种植两种或两种以上的作物。

Alley cropping; strip cropping

条植法；条播法

Inwheat intercropped with soybean not only N situation could be improved butalso P situation could be.2In intercropping,the pH of soybean rhizospherewas decreased by increasing the R-Apase activity,which could decelerate thetransforming and fixing P fertilizer.3In both monoculture and intercroppingsystem,the soil pH of rhizosphere was affected by cropping system at two Plevel which only 0.1-4mm distance from the root surface,but the effect of S-Apase activity in the rhizospher soil by cropping system was less than3mm.In effect,the rhizosphere P was really available nutrient,and applyingP to rhizosphere was effective ways to reduce the P nutrient competition.4Inwheat/soybean intercropping,the peak stage of reduction ability of roots wasthe same as that of the root growth,so that the time compensation appearedin intensity of nutrient absorption.

间套作大豆、小麦、玉米根系Apase的差异又反映出大豆利用土壤磷的潜在能力最大，而玉米最小，可见禾谷类的小麦与大豆间套后不但能改善小麦的氮素营养状况还使磷素营养也得以好转。2）间套大豆根际pH值的下降，导致磷肥施入土壤后形成〓-P的比例显著提高，转化成〓-P等难溶性磷减少，说明间套的大豆能减缓肥料磷在土壤中的转化和固定，减少磷素向无效化方向转化。3）复合群体根际土壤pH值的影响一般只发生在0.1-4mm的根际微区，而土壤磷酸酶的影响供磷与否在距根表3mm以外都无多大差异，说明根际磷才是真正有效磷，根际施磷是解决磷素竞争的有效途径。4）。

" I' d like to get some rough idea about music in the baroque ear, please."

请简要介绍一下巴罗克时期的音乐，好吗？

The results showed that the peak latency and pattern of SEPs elicited by electrical needling in LI-l1 and MP were similar. The amplitude of SEPs elicited by electrical needling in LI-l1 was higher than that of MP. There was no obvious SEPs generation when MM was electrical needling.

结果显示，电针刺激曲池穴和其邻近桡侧伸腕长肌运动点诱发性脑电波的波形和波峰时间是类似的，只是穴位的诱发性脑电波波幅较大，而电针刺激非穴位点并没有明显的诱发性脑电位。