【摘 要】
：
研究了固定道垄作条件下,春小麦的土壤水分动态变化.结果表明:不同栽培措施下,0～120 cm土层土壤贮水量的变异系数随着土层的加深而减小,其中剧变层(0～30 cm)的土壤贮水量因受降
【机 构】
：
甘肃农业大学农学院,甘肃省农科院土壤肥料与节水农业研究所
论文部分内容阅读
研究了固定道垄作条件下,春小麦的土壤水分动态变化.结果表明:不同栽培措施下,0～120 cm土层土壤贮水量的变异系数随着土层的加深而减小,其中剧变层(0～30 cm)的土壤贮水量因受降水和灌溉的影响变化剧烈;小麦拔节期固定道垄作0～60 cm土壤贮水量高于其它处理5 mm左右;抽穗到灌浆期,土壤贮水量下降幅度最大,表现出良好的供水性,可节水200 mm左右,水分利用效率较传统提高31.66 %.
其他文献
The crystals of quartz,lithium,and piezoelectric ceramics have a piezoelectric effect as their major characteristic.The surface acoustic wave filter (SAWF) was
A rail type mobile robot introduced in this paper is used to carry out automatic welding on the T,Y and K-joints in offshore platform jackets.This robotic syste
With rapid development of femtocell,dense deployment of femtocells in buildings will become an important study scenario.In this scenario,there exists severe int
Error modelling and compensating technology is an effective method to improve the processing precision.The position and orientation deviation of workpiece is ca
To fully exploit the performance benefits of relay station (RS),in the two-hop cellular networks covering hotspots,when the number of RSs is predetermined,both
美国密西根大学的尼古拉·斯丹尼克教授对科研诚信问题有过深入研究.其撰写的"Fosteringintegrity in research:definitions,current knowledge,and future directions"一文,
Fatigue life and reliability of aero-engine blade are always of important significance to flight safety.The establishment of damage model is one of the key fact
The green and effective Baeyer-Villiger oxidation reaction of cyclohexanone for preparing ε-caprolactone is of particular importance in the synthesis of new po
以日本富有甜柿为试材,模拟甜柿采摘、运输、贮藏等不同贮藏环境条件下霉菌浸染过程,采用自然种植与洗涤稀释法,并结合菌种在试样中的回接鉴定,分析不同贮藏条件T富有甜柿的
人工肾主要用于治疗肾功能衰竭引起的尿毒症.随着高新技术和透析原理的深人研究,人工肾技术目前已从血液透析演变为血液净化,不断衍生出新的治疗技术和模式,拓宽了其临床应用