http://chineseinput.net/에서 pinyin(병음)방식으로 중국어를 변환할 수 있습니다.
변환된 중국어를 복사하여 사용하시면 됩니다.
- 中文 을 입력하시려면 zhongwen을 입력하시고 space를누르시면됩니다.
- 北京 을 입력하시려면 beijing을 입력하시고 space를 누르시면 됩니다.
RISS 인기검색어
- 검색키워드
- 저자 : Valenzuela Acevedo, Francisco Jose Gabriel (검색결과 1 건)
-
Effects of Nonuniform Root-zone Salinity on Na+, Cl- and Nitrate Uptake in Irrigated Almond
Valenzuela Acevedo, Francisco Jose Gabriel University of California, Davis ProQuest Dissertat 2018 해외박사(DDOD)
Californian agriculture is under increasing threat from salinity as a consequence of scarcer water resources, combined with the increasing use of low quality ground water. In many regions of California, groundwater used for irrigation, is compro. Almond is an important crop for California's with a surface of 890,000 acres planted supplying ~80% of the world almond exports and contributes $11 billion of total value added to California's economy and generates 104,000 direct and indi. Currently the main strategy used to manage salts consists of the application of water in excess of plant needs to leach salts from the root zone, traditionally this would be achieved by flood irrigation so the movement of water deep into the soi. As a consequence of the mobility of nitrate in the soil, salinity management imposes an additional environmental risk since the leaching of saline salts can easily result in the loss of nitrate from the cropping system. Collectively these constr. Historically salt levels in the root zone have been measured in saturated paste extracts (EC~e~) of soil cores collected from within the main rooting zone at different depth. The average value of all depths represents the saline level of the roo. Under the complex scenario of heterogeneous salinity the main challenge for studies on saline stress for California almond orchards is to develop methodologies that better simulate field conditions, and to conduct pot or other studies that attem. Two experiment experiments were carried out to test tree response under non-uniform saline conditions. Experiment 1: Non-uniform saline, osmotic and nutritional conditions in root sub-zones of plants were evaluated by the use of a split-root met.
연관 검색어 추천
이 검색어로 많이 본 자료
활용도 높은 자료
