Influence of Ectomycorrhiza on Nutrient Absorption of Pinus massoniana Seedlings Under Water Stress

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Charles Waters
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1 Forest Research * N P K N P 1 N P % % 1 K % % N K P N K 1 N P K S A Influence of Ectomycorrhiza on Nutrient Absorption of Pinus massoniana Seedlings Under Water Stress WANG Yi DING Gui-jie Institute of Forestation and Ecology Guizhou University Guiyang Guizhou China Abstract The effect of ectomycorrhiza on nutrient absorption of potted seedlings of Pinus massoniana under water stress was studied in greenhouse by inoculating Pisolithus tinctorius Cenococcum geophilum Cantharellus cibarius Fr. Suillus luteus L. Fr. Gray respectively. The results showed that ectomycorrhiza could significantly improve the absorption of content of N P and K in drought stress. The contents of N P and phosphatase activities of mycorrhizal seedling increased at first and then decreased with the water stress increase and reached the maximum in moderate stress. The seedling of inoculation Suillus luteus1 had the best absorption to N P and increased % and % respectively compared to control group. The content of K in mycorrhizal seedling inoculating Pisolithus tinctorius and Suillus luteus1 increased at first and then decreased with the increase of water stress and reached the maximum in the light stress. They increased by 222% and 119% respectively compared to the control group. N and K mainly distributed in the leaf while P equally distributed in root stem and leaf. The formation of mycorrhizal benefited the transportation of N and K upward. Inoculating Suillus luteus1 in mild and moderate stress had the best comprehensive effect in absorption and content of N P and K and at the same time it could promote seedling growth and enhance seedling drought resistance. Key words Pinus massoniana water stress ectomycorrhiza seedling nutrient AA *.

2 Pers. Coker et Couch C Cenococcum geophilum Fr. T 1 4 CK 2-5 Gamalero 6 AMF MMN d PD Azcón ml AMF N 300 ml Siddiqui 9 1 cm d Pinus massoniana Lamb. 75% 1 min h Mpa h 250 mm 280 mm95% ml m - 2 Sp7 S7 CK Sp1 S1 Suillus luteus L. Fr. Gray Cantharellus cibarius Fr. G Pisolithus tinctorius 5 kg cm 1 / g kg - 1 N P K / mg kg - 1 N P K / mg g - 1 Fe Mn Cu Zn / g kg - 1 Ca Mg / g kg A 25 ± 5 % 6 CK B S7 G S1 C T 5 % 50 ± 5 % 35 ± 5 % ±

3 2 229 S7 G S1 T N CK % 60 d % % % CK N N N 100% 0 N 18 CK 2 C N g N P kg S7 S1 K N % 3. 07% S7 S N EXCEL SPSS % 20. 4% N T N S1 N 2 p < % S7 S1 N S7 2 N P K g kg - 1 N S ± cc ± fe ± ed ± bb G ± dd ± bb ± cc ± cc S ± ee ± ed ± fe ± cc C ± ff ± cc ± dd ± dd T ± bb ± dc ± bb ± ed CK ± aa ± aa ± aa ± aa P S ± bb ± db ± bb ± bbc G ± bcb ± cb ± bb ± bbc S ± cdbc ± ec ± bb ± bc C ± dec ± fd ± bb ± aab T ± ec ± ba ± bab ± bc CK ± aa ± aa ± aa ± aa K S ± ee ± bb ± bb ± cc G ± dd ± dd ± aa ± bb S ± cc ± ee ± ee ± dd C ± ccd ± ff ± dd ± ee T ± bb ± cc ± cc ± ee CK ± aa ± aa ± aa ± aa p < p < 0. 01

4 N 2. 2 P P P P P P 2 CK P P P p < P S % > C % > S % > G % > T % P P CK 2 T P g kg C P 33. 0% P p < S % > G 70. 2% > S % > C 34. 7% > T 22. 8% S7 G S1 P CK p < P 2 P 3 mg g - 1 S ± de ± ef ± cd ± bb G ± cc ± cc ± cc ± dd S ± bb ± bb ± ee ± fe C ± ef ± de ± df ± ef T ± cd ± cdd ± bb ± cc CK ± aa ± aa ± aa ± aa S ± ee ± dd ± ee ± dc G ± dd ± ee ± dd ± ba S ± ee ± ff ± ff ± ed C ± cc ± cc ± cc ± aba T ± bb ± bb ± bb ± cb CK ± aa ± aa ± aa ± aa 2. 3 K CK 2 p < K K S7 G T K

2 231 S1 C K C S1 K K 3 C S1 4 K p < 0. 01 17. 7% 12. 6% N P K K 4 MS F P N P MS F P K MS F P A 3. 13 511. 50 0. 000 0. 06 43. 30 0. 000 6. 10 1. 12 0. 000 B 45. 80 7. 49 0. 000 0. 27 208. 90 0.

5 2 231 S1 C K C S1 K K 3 C S1 4 K p < % 12. 6% N P K K 4 MS F P N P MS F P K MS F P A B A B p < K 2. 4 N P K 4 N S1 N N N P S7 G S1 P p > N P K K K K K S1 K K

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