Effects of Reducing Irrigation and Chemical Fertilizers on Forms and Distribution of Inorganic Phosphorus in Facility Vegetable Field of Black Soil

doi:10.11924/j.issn.1000-6850.casb2021-0106

Abstract

Abstract:

In this study, facility vegetable field of black soil in northeast China was taken as the research object, and three treatments of regular chemical fertilizers + regular irrigation (WF), regular irrigation + 80% chemical fertilizers (W80%F) and 80% regular irrigation + regular fertilizers (80%WF) were set to study the effect of reducing irrigation and chemical fertilizers on inorganic phosphorous and its availability in facility vegetable field. The results showed that: compared with the regular irrigation and chemical fertilizers treatment, the content of soil available phosphorus increased slightly after 4 years of reducing irrigation and chemical fertilizers treatment, and the content of soil available phosphorus in reducing irrigation treatment was higher than that in reducing chemical fertilizers treatment. With the increase of soil depth, the contents of soil available phosphorus decreased gradually in the same treatment. The order of inorganic phosphorus content from high to low was: Ca₈-P > O-P > Fe-P > Ca₁₀-P > Ca₂-P > Al-P, and it gradually decreased with the increasing soil depth. Ca₈-P and Al-P accounted for the largest proportion. Correlation analysis showed that: Ca₂-P, Ca₈-P, Al-P, Ca₁₀-P and Fe-P had significant positive correlation with the content of available phosphorus, the correlation coefficient of each form of inorganic phosphorus and available phosphorus content was Ca₂-P>Al-P>Ca₈-P>Ca₁₀-P>Fe-P>O-P.

Key words: black soil, reducing irrigation and chemical fertilizers, facility vegetable field, inorganic phosphorous forms, distribution in soil profile, correlation

CLC Number:

S151.9

Guan Shiyang, Wang Jiaqi, Yu He, Jiao Xiaoguang, Wang Yao, Xu Xin, Chen Yimin, Sui Yueyu. Effects of Reducing Irrigation and Chemical Fertilizers on Forms and Distribution of Inorganic Phosphorus in Facility Vegetable Field of Black Soil[J]. Chinese Agricultural Science Bulletin, 2021, 37(23): 89-93.

Figures/Tables 3

References 28

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深度/cm	Ca₂-P	Ca₈-P	Ca₁₀-P	Al-P	Fe-P	O-P
0~20	0.919^**	0.889^**	0.708^*	0.943^**	0.528^*	0.432
20~40	0.888^**	0.892^**	0.721^*	0.922^**	0.557^*	0.351
40~60	0.946^**	0.847^**	0.717^*	0.897^**	0.548^*	0.382
60~80	0.901^**	0.856^**	0.631^*	0.836^**	0.527^*	0.242
80~100	0.927^**	0.914^**	0.698^*	0.934^**	0.538^*	0.344

深度/cm	Ca₂-P	Ca₈-P	Ca₁₀-P	Al-P	Fe-P	O-P
0~20	0.919^**	0.889^**	0.708^*	0.943^**	0.528^*	0.432
20~40	0.888^**	0.892^**	0.721^*	0.922^**	0.557^*	0.351
40~60	0.946^**	0.847^**	0.717^*	0.897^**	0.548^*	0.382
60~80	0.901^**	0.856^**	0.631^*	0.836^**	0.527^*	0.242
80~100	0.927^**	0.914^**	0.698^*	0.934^**	0.538^*	0.344