The Impact on Soil Nutrient of the Tea-Walnut Intercropping

doi:10.3969/j.issn.1000-2561.2019.04.005

Abstract

Abstract:

The top 0-20 cm soil and the 20-40 cm soil with 1 m, 2 m and 3 m distance from walnut trunk of tea tree-walnut intercropping gardens aged 6 years, 10 years, 15 years and 30 years in Changning, Baoshan City were used to determine the soil pH, organic matter, alkali-hydro nitrogen, available phosphorus and available potassium, exchange of exchangeable calcium and magnesium content. The soil pH value of the intercropping tea garden increased with the extension of walnut tree planting time. The soil pH value of the walnut tree planted for 30 years was close to or greater than 7.0. The contents of soil organic matter, alkali-hydrolysis nitrogen and rapidly-available phosphorus in the intercropping tea garden with intercropping life of 30 years were significantly lower than those in the single-cropping tea garden. With the extension of intercropping years, the content of available potassium, exchangeable calcium and exchangeable magnesium in the intercropping tea garden was higher than that in the single-cropping tea garden. The above results indicate that walnut tree has obvious allelopathy inhibition on tea trees, which leads to the failure of tea tree growth and the decline of tea quality. Therefore, it is not suitable to have the two intercropped or use walnut trees as the shade trees to tea.

Key words: tea, walnut, intercropping patterns, soil nutrients

TIAN Hongmin,LUO Meiling,YANG Xuemei,WANG Wei,YANG Bin,LI Jiahua,ZHAO Ping. The Impact on Soil Nutrient of the Tea-Walnut Intercropping[J]. Chinese Journal of Tropical Crops, 2019, 40(4): 657-663.

Figures/Tables 9

References 10

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地点 Places	海拔 Altitude/m	经度 Longitude	纬度 Latitude	核桃种植年限 Walnut planting years/a
昌宁县翁堵乡	1807.0	99°589′	24°694′	6~30
昌宁县田园镇	2031.0	99°735′	24°779′	6~30
昌宁县翁兴村	1798.0	99°589′	24°694′	6~30
昌宁县温泉乡	1990.0	99°750′	24°736′	6~30

地点 Places	海拔 Altitude/m	经度 Longitude	纬度 Latitude	核桃种植年限 Walnut planting years/a
昌宁县翁堵乡	1807.0	99°589′	24°694′	6~30
昌宁县田园镇	2031.0	99°735′	24°779′	6~30
昌宁县翁兴村	1798.0	99°589′	24°694′	6~30
昌宁县温泉乡	1990.0	99°750′	24°736′	6~30

土壤深度 Soil depth/cm	取样点-核桃间距 Sampling point-walnut distance	土壤pH The pH of the soil
		6 a		10 a		15 a		30 a
		间作	单作	间作	单作	间作	单作	间作	单作
0~20	1 m	5.19^a	4.89^c	5.57^a	4.30^d	5.38^a	4.88^c	7.45^a	4.67^d
	2 m	5.07^b		5.50^a		5.30^a		7.40^a
	3 m	5.00^b		5.14^c		5.31^a		6.28^c
	平均	5.09^b		5.40^b		5.26^b		7.04^b
20~40	1 m	5.12^a	4.85^c	4.92^a	4.20^e	5.31^a	4.85^d	7.02^a	4.69^d
	2 m	5.00^b		4.82^b		5.30^a		7.02^a
	3 m	5.01^b		4.56^d		5.26^c		6.51^c
	平均	5.04^b		4.77^c		5.29^b		6.85^b

土壤深度 Soil depth/cm	取样点-核桃间距 Sampling point-walnut distance	土壤pH The pH of the soil
		6 a		10 a		15 a		30 a
		间作	单作	间作	单作	间作	单作	间作	单作
0~20	1 m	5.19^a	4.89^c	5.57^a	4.30^d	5.38^a	4.88^c	7.45^a	4.67^d
	2 m	5.07^b		5.50^a		5.30^a		7.40^a
	3 m	5.00^b		5.14^c		5.31^a		6.28^c
	平均	5.09^b		5.40^b		5.26^b		7.04^b
20~40	1 m	5.12^a	4.85^c	4.92^a	4.20^e	5.31^a	4.85^d	7.02^a	4.69^d
	2 m	5.00^b		4.82^b		5.30^a		7.02^a
	3 m	5.01^b		4.56^d		5.26^c		6.51^c
	平均	5.04^b		4.77^c		5.29^b		6.85^b

土壤深度 Soil depth/cm	取样点-核桃间距 Sampling point-walnut distance	土壤的有机质 Organic matter of the soil/(g?kg^-1)
		6 a		10 a		15 a		30 a
		间作	单作	间作	单作	间作	单作	间作	单作
0~20	1 m	40.88^a	26.22^e	40.05^a	30.95^e	42.90^a	13.47^e	17.74^c	27.54^a
	2 m	37.70^b		37.21^c		40.96^b		14.24^e
	3 m	31.77^d		35.05^d		37.81^d		20.66^b
	平均	36.78^c		37.44^b		40.56^c		17.55^d
20~40	1 m	38.81^a	25.43^e	37.55^a	28.79^e	41.25^a	17.18^e	19.02^c	27.72^a
	2 m	34.53^b		36.53^b		38.15^c		21.88^b
	3 m	29.49^d		33.00^d		35.76^d		13.83^e
	平均	34.28^c		35.69^c		38.39^b		18.24^d