Results 1 to 10 of about 25 (23)
Shuitu Baochi Xuebao, 2021 为了明确不同茬口土壤养分的固持残留水平，建立高效合理的轮作顺序以解决连作再植障碍问题。2018年在甘肃定西渭源县莲峰镇绽坡村随机区组设计、"S"形取样休耕1季、种植1季春小麦、马铃薯、蒙古黄芪和当归后0-20 cm层次的黑麻土壤，测定土壤全量、速效养分和阴阳离子含量。结果表明：休耕1季和种植1季蒙古黄芪增加了0-20 cm层次土壤的有机质、全氮、速效磷、速效钾、阴阳离子、Mg2+、SO42-和Cl-含量，种植1季当归降低了0-20 cm层次土壤的有机质、全氮、速效磷、速效钾、阴阳离子、Mg2+、SO42-
姜小凤 +5 more
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Shuitu Baochi Xuebao, 2007 在山西临汾、襄汾采用大区对比法研究了土壤质地和茬口对小麦产量及水分利用效率的影响。结果表明:小麦产量轻壤土质夏季复播作物茬口低于夏季休闲茬口,而中壤土质夏季复播作物茬口高于夏季休闲茬口;小麦播前贮水量轻壤土质夏季复播作物茬口低于夏季休闲茬口,而中壤土质夏季复播作物茬口高于夏季休闲茬口;轻壤土质全生育期0~100 cm,0~200 cm,100~200 cm的耗水量均以休闲茬口>大豆茬口>绿豆茬口,中壤土质拔节期贮水量、拔节至成熟阶段0~100 cm,0~200 cm,100~200 ...
崔欢虎 +5 more
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Shuitu Baochi Xuebao, 2020 在不同海拔高度利用大田对比方法，开展了小麦生育期严重干旱年型夏闲期不同轮作压青茬口对麦田土壤水分及水分利用效率的研究。结果表明：不同轮作压青茬口的小麦播种期和成熟期不同土层贮水量海拔点998 m均高于海拔点459 m，且0—100，100—200，200—300 cm土层贮水量均存在极显著差异，2个海拔点各轮作压青茬口的播种期0—100，100—200 cm土层贮水量均基本呈现同一茬口随压青时间推迟其贮水量降低；不同轮作压青茬口播种期与成熟期间0—100，100—200，200—300 ...
马爱平 +5 more
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Shuitu Baochi Xuebao, 2004 试验监测了不同种植茬口和玉米地秋后不同处理下土壤含水量变化情况,监测结果表明,春播前玉米地表层土壤含水量分别比谷子和大豆地表层土壤含水量低55%,52%,其他土层深度的土壤含水量也均为玉米地最低,谷子和大豆地较高;秋后玉米地的4种处理方式中,土壤含水量高低依次为覆膜＞灭茬＞刨茬＞留茬,其覆膜处理的表层土壤含水量达到11.76%,覆膜和灭茬处理的土壤含水量随监测时间的延长变化不大,刨茬和留茬处理土壤含水量都随监测时间的延长而下降.
张玉龙 邹洪涛 杨宇 黄毅
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晋南旱垣种植制度及土壤耕作方式对麦田周年土壤水分动态和水分利用效率的影响
Shuitu Baochi Xuebao, 2017 为了高效贮蓄利用夏季降水资源，明确不同种植制度及土壤耕作方式的麦田周年土壤水分动态变化规律，在山西临汾采用大区对比方法研究了麦茬复播谷子、休闲期土壤耕作方式对麦田周年土壤水分动态及水分利用效率的影响。结果表明：在夏季降雨较少年型，在小麦播种期0—200 cm土层贮水量为休闲制少耕＞休闲制传统耕作＞休闲制免耕＞麦茬复播谷子，麦茬复播谷子全生育期0—200 cm土层的耗水量高于休闲制的3个不同土壤耕作方式。在小麦生育期降水较多年型，0—200 ...
马爱平 +6 more
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Shuitu Baochi Xuebao, 2007 在山西临汾、襄汾采用大区对比法研究了土壤质地、耕作方式及茬口对小麦播前土壤贮水量的影响。结果表明：夏闲制不同土壤质地的传统土壤耕作方式,小麦播前0-200cm的各主要土壤层面的贮水量为中粘土〉中壤土〉轻壤土;夏季复播制的土壤质地和复播作物对小麦播前贮水量的影响以土壤质地〉复播作物种类;夏闲制不同土壤耕作方式的小麦播前贮水量以浅旋灭茬〉免耕〉隔行深松〉传统耕作〉全耕层深松。不同春播作物茬口小麦播前的贮水量以地黄茬贮水量最高,其次为丹参茬,棉花茬较差 ...
崔欢虎 +5 more
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Some of the next articles are maybe not open access.
Noise Suppression Effect of Soft Magnetic Co-Pd-B-O Films with Large è¬Å and BS
INTERMAG 2006 - IEEE International Magnetics Conference, 2006Magnetic properties and noise suppression effect of Co85B15-Pd-O soft magnetic nano-granular thin films were investigated. Films with a wide compositional range were prepared by the reactive sputtering method. Soft magnetic films were obtained in the compositional range with the O content more than the Co-Pd-B2O3, where there can be simultaneously ...
S. Ohnuma +3 more
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Motorization, Vehicle Purchase and Use Behavior in China: A Shanghai Surveyä¸åœ‹ä¹‹æ©Ÿå‹•åŒ–æš¨äº¤é€šå·¥å…·è³¼è²·å Šä½¿ç”¨è¡Œç‚ºï¼šä¸Šæµ·èª¿ç ”å Šæ¡ˆä¾‹åˆ†æž [PDF]
, 2008 Motorization is the transition from non-motorized travel means (e.g., walk) to motorized travel means (e.g., car). China, as the most populous country in the world, has started the motorization process, and its results will have huge impact on the whole world in terms of transportation, energy, environment and automobile market.
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Campos lexicais em provérbios portugueses e chineses de temática agrícola: um estudo comparativo [PDF]
, 2022 O presente trabalho propõe-se estudar, comparativamente, a presença de campos lexicais ligados à área agrícola em provérbios portugueses e chineses. No primeiro capítulo, procede-se à descrição dos conceitos de ‘léxico’ e ‘campo lexical’, bem como ...
Yutong Zhang
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