[ファルジーシアデヌダタ密度が、そのごみ収集生産、栄養の復帰、栄養使用効率に及ぼす影響]

3つの密度の影響に関する2年間の研究（D1、80 +/- 5ステムx m（-2）; D2、140 +/- 8茎x m（-2）;およびD3、220 +/- 11ステムx m（-2））効率により、D1、D2、およびD3の密度では、年間のごみ収集量の生産量は793.2、1135.7、1458.5 kg x HM（-2）であり、炭素収益率は370.7、516.2、671.5 kg x Hm（-2）、およびN、P、CAおよびMGの総収益率はN、P、CAおよびMGの合計で16.3、29.3 kgであることが示されました。それぞれ。CAは最高のリターン（合計の45％-48％）、続いてN（24％-29％）、最低はPとMG（3％-5％）で、Ca> n> K> mgとPのシーケンスは、10月に（F. DENUDATE GOLDATION IN IN INESが標高がありました。F. 3つの密度での核葉におけるNとKの再配分に有意差はありませんでしたが、Pの再配置とCaおよびMgの蓄積は密度の増加とともに増加しました。ごみFの使用効率は最も高く、密度の増加とともに増加し、PがF. denudateの成長と再生の制限要因である可能性があることを意味します。

A two-year study on the effects of three densities (D1, 80 +/- 5 stems x m(-2); D2, 140 +/- 8 stems x m(-2); and D3, 220 +/- 11 stems x m(-2)) of Fargesia denudate in a F. denudata--Picea purpurea natural forest on the F. denudate litterfall production, nutrient return, and nutrient use efficiency showed that at the densities of D1, D2 and D3, the annual litterfall production was 793.2, 1135.7 and 1458.5 kg x hm(-2), carbon return was 370.7, 516.2 and 671.5 kg x hm(-2), and the total return of N, P, K, Ca and Mg was 16.3, 22.9 and 29.3 kg x hm(-2), respectively. Ca had the highest return (45%-48% of the total), followed by N (24%-29%), and the lowest were P and Mg (3%-5%), with the sequence of Ca > N > K > Mg and P. The peaks of litterfall production and nutrients return at the three densities were appeared in October (by the end of F. denudate growth season), and another peak at D3 was observed in August. There were no significant differences in the re-allocation of N and K in F. denudate leaves at the three densities, but the P re-allocation and the Ca and Mg accumulation increased with increasing density. The litterfall P use efficiency was the highest and increased with increasing density, implying that P could be a limiting factor for the growth and regeneration of F. denudate.