| Effect of moderate water deficit during seedling stage on growth and dry matter accumulation of soybean under different Pand Klevels |
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| DOI：10.7606/j.issn.1000-7601.2006.05.24 |
| Key Words: soybean moderate water deficit phosphorus potassium dry matter accumulation yield |
| Author Name | Affiliation | | TANG Mei | Agricultural College Guangxi University,Nanning 530005,China | | LI Fu-sheng | Agricultural College Guangxi University,Nanning 530005,China | | ZHANG Fu-cang | ．Key Lab of Agricultural Soil and Water Engineering in the Arid and Semiarid Areas Ministry of Education Northwest A＆F University,Yangling,Shaanxi 712100,China | | LIANG Ji-hua | Agricultural College Guangxi University,Nanning 530005,China | | WANG Li | Agricultural College Guangxi University,Nanning 530005,China | | CHEN Jun | Agricultural College Guangxi University,Nanning 530005,China |
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| Abstract: |
| A pot experiment was carried out to study the effects of water deficit during the seedling stage on growth,dry matter accumulation and yield of soybean under different P and K levels.The results showed that,under the same application of P and K fertilizer,slight water deficit during the seedling stage was the best treatment to increase dry matter accumulation and yield of soybean, and its water use efficiency was close to or more than that of conventional irrigation;however,medium water deficit and serious water deficit during the seedling stage reduced dry matter accumulation and yield of soybean markedly.Under the same water deficit,medium P and K fertilizer application was beneficial to increase pod number and seed number,thus improved yield and water use efficiency of soybean.Therefore,moderate water deficit(i.e.,60%～70% of field capacity) during the seedling stage and medium P and K level was an ideal water and fertilizer coupling to improve the output of soybean under the experimental condition. |
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