| Studies on Aloe vera under continuous seawater irrigation in the sandy sea-beach |
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| DOI：10.7606/j.issn.1000-7601.2006.06.08 |
| Key Words: sea-beach continuous seawater irrigation aloe vera growth yield salt content in soil |
| Author Name | Affiliation | | WANG Xue-qing | nv ironmental college Beijing University,Beijing 210095,China | | LIU Zhao-pu | College of resource and environment Nanjing Agricultural University,Nanjing,Jiangsu 210095,China | | ZHAO Geng-mao | College of resource and environment Nanjing Agricultural University,Nanjing,Jiangsu 210095,China | | ZHENG Qing-song | College of resource and environment Nanjing Agricultural University,Nanjing,Jiangsu 210095,China | | CHEN Jian-miao | Hainan Academy of Agricultural Science,Haikou,Hainan 571100,China | | YUN Yan | Institute of sea-beach Agriculture Nanjing Agricultural University,Ledong,Hainan 572541,China | | FU Yong-sheng | Institute of sea-beach Agriculture Nanjing Agricultural University,Ledong,Hainan 572541,China | | LIU Ling | College of resource and environment Nanjing Agricultural University,Nanjing,Jiangsu 210095,China |
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| Abstract: |
| Continuous seawater irrigation experiments for 3 years from seedling stage to leaf-picking stage were conducted in the sea-beach (noncultivated land) of Hainan Province.The results showed: ① During different growth and development period, effects of seawater irrigation on shoot yield of aloe were different.There was no difference of shoot yield among 10%, 25% seawater and fresh water irrigation, with seawater proportion increasing from 50% seawater, shoot yield decreased significantly from November 2000 to March 2003 (from seedling period to bolting period) .However, with irrigation time elongation, to leaf-picking period (May 2004) , aloe shoot yields of 10%, 25%, 50% seawater treatment are no significant different from that of control, while shoot yield decreased under 75% seawater treatment.② At the begin of aloe seedling under seawater irrigation (November 2000～January 2001) , root dry mass increased under all seawater treatments decreased significantly compared with control, with irrigation time elongation to March 2003, up to 75% seawater irrigation, root growth yield began to decrease, while root growth under 25% seawater treatment was much more than that under control.To leaf-picking period of May 2004, root growth under 75% and 100% seawater treatment much lower than that under control, while the other seawater treatments were not different from control.③ Salt content of different soil depth from November 2001 to March 2003 showed no order change.Up to May 2004, salt content in tillage soil and deep soil showed significant increasing trend, salt content in soil was below 0.2% even under 100% seawater irrigation.④ As a whole, available-P content was low, and available-P was no significantly different in every irrigation treatments.Available-K content was below 20 mg/kg in tillage soil of control and increased markedly under seawater irrigation. |
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